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        <PersonNm>C Dan Mote Jr</PersonNm>
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        <PersonNm>Harvey Fineberg</PersonNm>
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        <PersonNm>Victor Dzau-BEG 7114</PersonNm>
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        <PersonNm>Bruce Darling</PersonNm>
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        <PersonNm>Mary Salmon</PersonNm>
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        <PersonNm>Richard Bissell</PersonNm>
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        <PersonNm>James F Hinchman</PersonNm>
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        <PersonNm>Robert Skinner</PersonNm>
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        <BookValueAmt>278178</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
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      <OtherSecuritiesGrp>
        <Desc>GOLDMAN SACHS</Desc>
        <BookValueAmt>696918</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
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      <OtherSecuritiesGrp>
        <Desc>CAPITAL Z</Desc>
        <BookValueAmt>131106</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
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      <OtherSecuritiesGrp>
        <Desc>MIT PRIVATE EQUITY FUND</Desc>
        <BookValueAmt>1072173</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
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      <OtherSecuritiesGrp>
        <Desc>CEYUAN VENTURES II, LP</Desc>
        <BookValueAmt>1897593</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
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        <BookValueAmt>47622</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
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        <Desc>NEXUS INDIA, LP</Desc>
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        <BookValueAmt>12601458</BookValueAmt>
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      <OtherSecuritiesGrp>
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        <MethodValuationCd>F</MethodValuationCd>
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        <MethodValuationCd>F</MethodValuationCd>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <NetUnrealizedGainsInvstAmt>-1405168</NetUnrealizedGainsInvstAmt>
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      <RevenueNotReportedAmt>14693040</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>343939042</RevenueSubtotalAmt>
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        <FormAndLineReferenceDesc>Part V, line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>Earnings from the Endowment are used to further the exempt purposes of the organization. Approximately 1/3 each for unrestricted, prizes &amp; awards, various scientific programs.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XI, line 2d</FormAndLineReferenceDesc>
        <ExplanationTxt>AMOUNT REPORTED INCLUDES: COST OF GOODS SOLD $ 17,053,513 RENTAL EXPENSE 369,009 INVESTMENT-RELATED EXPENSES (734,829) UNREALIZED LOSS ON DERIVATIVES (498,484) UNREALIZED LOSS ON CHARITABLE GIFT ANNUITIES (91,001) ------------- TOTAL $ 16,098,208</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FIN 48 (ASC 740)</FormAndLineReferenceDesc>
        <ExplanationTxt>NAS is exempt from federal income taxes under Section 501(c)(3) of the Internal Revenue Code, except for unrelated business income. NAS recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. NAS does not believe its financial statements include any uncertain tax positions.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XII, line 2d</FormAndLineReferenceDesc>
        <ExplanationTxt>AMOUNT REPORTED INCLUDES: COST OF GOODS SOLD $ 17,053,513 RENTAL EXPENSE 369,009 INVESTMENT-RELATED EXPENSES (734,829) ------------ TOTAL $ 16,687,693</ExplanationTxt>
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        <PurposeOfGrantTxt>Research Grant</PurposeOfGrantTxt>
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      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>South Asia</RegionTxt>
        <PurposeOfGrantTxt>Research Grant</PurposeOfGrantTxt>
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      <GrantsToOrgOutsideUSGrp>
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        <PurposeOfGrantTxt>Research Grant</PurposeOfGrantTxt>
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      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>South Asia</RegionTxt>
        <PurposeOfGrantTxt>Research Grant</PurposeOfGrantTxt>
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      </GrantsToOrgOutsideUSGrp>
      <GrantsToOrgOutsideUSGrp>
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        <PurposeOfGrantTxt>Research Grant</PurposeOfGrantTxt>
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      <GrantsToOrgOutsideUSGrp>
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      <GrantsToOrgOutsideUSGrp>
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      <GrantsToOrgOutsideUSGrp>
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      <GrantsToOrgOutsideUSGrp>
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        <PurposeOfGrantTxt>Research Grant</PurposeOfGrantTxt>
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      <GrantsToOrgOutsideUSGrp>
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        <PurposeOfGrantTxt>Research Grant</PurposeOfGrantTxt>
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      <GrantsToOrgOutsideUSGrp>
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      <GrantsToOrgOutsideUSGrp>
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        <FormAndLineReferenceDesc>Schedule F, Part 1, line 2</FormAndLineReferenceDesc>
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        <PersonNm>Victor Dzau-BEG 7114</PersonNm>
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        <PersonNm>Bruce Darling</PersonNm>
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        <PersonNm>Mary Salmon</PersonNm>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Richard Bissell</PersonNm>
        <TitleTxt>Executive Director PGA</TitleTxt>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>James F Hinchman</PersonNm>
        <TitleTxt>Dep Exec OFCR/ Chief OP OFCR</TitleTxt>
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        <TotalCompensationFilingOrgAmt>478245</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Clyde Behney</PersonNm>
        <TitleTxt>Interim Executive Director IOM</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Robert Skinner</PersonNm>
        <TitleTxt>Executive Director TRB</TitleTxt>
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        <TotalCompensationFilingOrgAmt>339245</TotalCompensationFilingOrgAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Y Leonard Kim</PersonNm>
        <TitleTxt>Chief Information Officer</TitleTxt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Eric Grant</PersonNm>
        <TitleTxt>RERF Assistant Chief Research</TitleTxt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Kenneth Fulton</PersonNm>
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        <PersonNm>Roy Shore</PersonNm>
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        <PersonNm>Reid Landes</PersonNm>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE J, PART I, LINE 1, HOUSING ALLOWANCE</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PRESIDENT OF THE Institute of Medicine RECEIVED A SUPPLEMENT TO SALARY FOR THE COST OF RENTAL HOUSING IN THE WASHINGTON, DC AREA FOR PERSONAL USE AND TRAVEL EXPENSES BETWEEN NORTH CAROLINA AND WASHINGTON, DC. THE ALLOWANCE IS REPORTED AS TAXABLE INCOME ON FORM W-2.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE J, PART I, LINE 1, TRAVEL FOR COMPANIONS</FormAndLineReferenceDesc>
        <ExplanationTxt>NAS PROVIDES REIMBURSEMENT FOR THE TRAVEL EXPENSES OF ONLY THE SPOUSES OF THE PRESIDENTS OF THE NAS, NAE AND IOM, AND ONLY IN CIRCUMSTANCES IN WHICH THE SPOUSE'S PRESENCE SERVES A BONA FIDE BUSINESS PURPOSE OF THE NAS AND THE EXPENSES HAVE BEEN PROPERLY SUBSTANTIATED, IN ACCORDANCE WITH THE NAS POLICY ON PRESIDENTIAL EXPENSES. COMPLIANCE WITH THE POLICY IS VERIFIED EACH YEAR THROUGH A SURVEY OF THE EXECUTIVE OFFICES OF THE PRESIDENTS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE J, PART I, LINE 1, TAX INDEMNIFICATION AND GROSS-UP PAYMENTS</FormAndLineReferenceDesc>
        <ExplanationTxt>NAS PROVIDES TAX EQUALIZATION PAYMENTS FOR EMPLOYEES ON INTERNATIONAL ASSIGNMENT GREATER THAN SIX MONTHS. THE OBJECTIVE OF THE NAS TAX EQUALIZATION GUIDELINES IS TO PROVIDE A FRAMEWORK WHEREBY AN EMPLOYEE MAY BE TRANSFERRED TO AND AMONG INTERNATIONAL LOCATIONS(S) WHILE INCURRING AN INDIVIDUAL TAX BURDEN SIMILAR TO THAT WHICH THE EMPLOYEE WOULD HAVE BEEN PAID HAD THE EMPLOYEE NOT RECEIVED ALLOWANCES AND SPECIAL TAX CONSIDERATIONS RESULTING FROM A FOREIGN ASSIGNMENT.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE J, PART-TIME OFFICERS COMPENSATION</FormAndLineReferenceDesc>
        <ExplanationTxt>FOR THE VICE PRESIDENT, TREASURER, FOREIGN SECRETARY AND HOME SECRETARY, WORK IS BASED ON A PERCENTAGE LEVEL OF EFFORT, WHICH RANGES BETWEEN 25% AND 50%. NAS REIMBURSES EACH PART-TIME OFFICER'S HOME INSTITUTION FOR THE APPLICABLE PERCENTAGE OF SALARY PAID BY THE HOME INSTITUTION. INSTITUTE OF MEDICINE (IOM) PRESIDENT TRANSITION AS OF JULY 1, 2014, VICTOR DZAU SUCCEEDED HARVEY FINEBERG AS THE PRESIDENT OF NATIONAL ACADEMY OF SCIENCES, INSTITUTE OF MEDICINE (IOM). THE COMPENSATION AMOUNTS REPORTED FOR THOSE TWO INDIVIDUALS ARE FOR THE PARTIAL YEAR THEY SERVED AS PRESIDENT - IOM.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE J, PART I, LINE 7, NON-FIXED PAYMENTS</FormAndLineReferenceDesc>
        <ExplanationTxt>CERTAIN KEY EMPLOYEES OF NAS RECEIVED LUMP-SUM MERIT AWARDS. MERIT AWARDS WERE DETERMINED BY A NUMBER OF VARIABLES INCLUDING BUT NOT LIMITED TO INDIVIDUAL PERFORMANCE AS WELL AS ORGANIZATION OPERATIONAL ACHIEVEMENTS. THE MERIT AWARDS PAYMENTS ARE REPORTED IN PART II, COLUMN B(II).</ExplanationTxt>
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        <TotalProceedsAmt>60876507</TotalProceedsAmt>
        <InReserveFundAmt>0</InReserveFundAmt>
        <CapitalizedInterestAmt>4931470</CapitalizedInterestAmt>
        <RefundingEscrowAmt>0</RefundingEscrowAmt>
        <IssuanceCostsFromProceedsAmt>297750</IssuanceCostsFromProceedsAmt>
        <CreditEnhancementAmt>0</CreditEnhancementAmt>
        <WorkingCapitalExpendituresAmt>0</WorkingCapitalExpendituresAmt>
        <CapitalExpendituresAmt>52866639</CapitalExpendituresAmt>
        <OtherSpentProceedsAmt>2780648</OtherSpentProceedsAmt>
        <UnspentAmt>0</UnspentAmt>
        <SubstantialCompletionYr>2012</SubstantialCompletionYr>
        <CurrentRefundingInd>false</CurrentRefundingInd>
        <AdvanceRefundingInd>false</AdvanceRefundingInd>
        <FinalAllocationMadeInd>true</FinalAllocationMadeInd>
        <AdequateBooksAndRecMaintInd>true</AdequateBooksAndRecMaintInd>
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      <TaxExemptBondsPrivateBusUseGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <PrivateBusUseByOthersPct>0</PrivateBusUseByOthersPct>
      </TaxExemptBondsPrivateBusUseGrp>
      <TaxExemptBondsPrivateBusUseGrp>
        <BondReferenceCd>B</BondReferenceCd>
        <PrivateBusUseByOthersPct>0</PrivateBusUseByOthersPct>
      </TaxExemptBondsPrivateBusUseGrp>
      <TaxExemptBondsPrivateBusUseGrp>
        <BondReferenceCd>C</BondReferenceCd>
        <OwningBondFinancedPropertyInd>false</OwningBondFinancedPropertyInd>
        <AnyLeaseArrangementsInd>false</AnyLeaseArrangementsInd>
        <MgmtContractBondFincdPropInd>true</MgmtContractBondFincdPropInd>
        <EngageBondCounselContractsInd>true</EngageBondCounselContractsInd>
        <AnyResearchAgreementsInd>true</AnyResearchAgreementsInd>
        <EngageBondCounselResearchInd>true</EngageBondCounselResearchInd>
        <PrivateBusUseByOthersPct>0.04880</PrivateBusUseByOthersPct>
        <PrivateBusConcerningUBIPct>0.00006</PrivateBusConcerningUBIPct>
        <TotalPrivateBusinessUsePct>0.04886</TotalPrivateBusinessUsePct>
        <BondIssMeetPrvtSecPymtTestInd>false</BondIssMeetPrvtSecPymtTestInd>
        <ChangeInUseBondFinancedPropInd>false</ChangeInUseBondFinancedPropInd>
        <RemedialActionTakenInd>false</RemedialActionTakenInd>
        <ProcsNonqualifiedBondRemdtdInd>true</ProcsNonqualifiedBondRemdtdInd>
      </TaxExemptBondsPrivateBusUseGrp>
      <TaxExemptBondsArbitrageGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <Form8038TFiledInd>false</Form8038TFiledInd>
        <RebateNotDueYetInd>true</RebateNotDueYetInd>
        <ExceptionToRebateInd>true</ExceptionToRebateInd>
        <NoRebateDueInd>true</NoRebateDueInd>
        <VariableRateIssueInd>true</VariableRateIssueInd>
        <HedgeIdentifiedInBksAndRecInd>false</HedgeIdentifiedInBksAndRecInd>
        <HedgeProviderName>
          <BusinessNameLine1Txt>0</BusinessNameLine1Txt>
        </HedgeProviderName>
        <GrossProceedsInvestedInGICInd>false</GrossProceedsInvestedInGICInd>
        <GICProviderName>
          <BusinessNameLine1Txt>0</BusinessNameLine1Txt>
        </GICProviderName>
        <GrossProceedsInvestedInd>false</GrossProceedsInvestedInd>
        <WrittenProcToMonitorReqsInd>true</WrittenProcToMonitorReqsInd>
      </TaxExemptBondsArbitrageGrp>
      <TaxExemptBondsArbitrageGrp>
        <BondReferenceCd>B</BondReferenceCd>
        <Form8038TFiledInd>false</Form8038TFiledInd>
        <RebateNotDueYetInd>true</RebateNotDueYetInd>
        <ExceptionToRebateInd>true</ExceptionToRebateInd>
        <NoRebateDueInd>true</NoRebateDueInd>
        <VariableRateIssueInd>true</VariableRateIssueInd>
        <HedgeIdentifiedInBksAndRecInd>false</HedgeIdentifiedInBksAndRecInd>
        <HedgeProviderName>
          <BusinessNameLine1Txt>0</BusinessNameLine1Txt>
        </HedgeProviderName>
        <GrossProceedsInvestedInGICInd>false</GrossProceedsInvestedInGICInd>
        <GICProviderName>
          <BusinessNameLine1Txt>0</BusinessNameLine1Txt>
        </GICProviderName>
        <GrossProceedsInvestedInd>false</GrossProceedsInvestedInd>
        <WrittenProcToMonitorReqsInd>true</WrittenProcToMonitorReqsInd>
      </TaxExemptBondsArbitrageGrp>
      <TaxExemptBondsArbitrageGrp>
        <BondReferenceCd>C</BondReferenceCd>
        <Form8038TFiledInd>false</Form8038TFiledInd>
        <RebateNotDueYetInd>false</RebateNotDueYetInd>
        <ExceptionToRebateInd>true</ExceptionToRebateInd>
        <NoRebateDueInd>true</NoRebateDueInd>
        <VariableRateIssueInd>false</VariableRateIssueInd>
        <HedgeIdentifiedInBksAndRecInd>false</HedgeIdentifiedInBksAndRecInd>
        <HedgeProviderName>
          <BusinessNameLine1Txt>0</BusinessNameLine1Txt>
        </HedgeProviderName>
        <GrossProceedsInvestedInGICInd>false</GrossProceedsInvestedInGICInd>
        <GICProviderName>
          <BusinessNameLine1Txt>0</BusinessNameLine1Txt>
        </GICProviderName>
        <GrossProceedsInvestedInd>false</GrossProceedsInvestedInd>
        <WrittenProcToMonitorReqsInd>true</WrittenProcToMonitorReqsInd>
      </TaxExemptBondsArbitrageGrp>
      <ProceduresCorrectiveActionGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <ProceduresCorrectiveActionInd>true</ProceduresCorrectiveActionInd>
      </ProceduresCorrectiveActionGrp>
      <ProceduresCorrectiveActionGrp>
        <BondReferenceCd>B</BondReferenceCd>
        <ProceduresCorrectiveActionInd>true</ProceduresCorrectiveActionInd>
      </ProceduresCorrectiveActionGrp>
      <ProceduresCorrectiveActionGrp>
        <BondReferenceCd>C</BondReferenceCd>
        <ProceduresCorrectiveActionInd>true</ProceduresCorrectiveActionInd>
      </ProceduresCorrectiveActionGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE K, PART III, LINE 3A, COLUMN C</FormAndLineReferenceDesc>
        <ExplanationTxt>NAS HAS ENTERED INTO A MANAGEMENT OR SERVICE CONTRACT, WHICH NAS BELIEVES SATISFIES THE SAFE HARBOR STANDARDS UNDER REV. PROC. 97-13.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE K, PART III, LINE 3B, COLUMN C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE NAS HAS ENTERED INTO RESEARCH AGREEMENTS, WHICH NAS BELIEVES SATISFIES THE SAFE HARBOR STANDARDS UNDER REV. PROC. 2007-47.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE K, PART IV, LINE 2C, COLUMN A</FormAndLineReferenceDesc>
        <ExplanationTxt>FOR BOND CUSIP #2548394D2, THE REBATE COMPUTATION WAS PERFORMED ON DECEMBER 3, 2012.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE K, PART IV, LINE 2C, COLUMN B</FormAndLineReferenceDesc>
        <ExplanationTxt>FOR BOND CUSIP #2548395A7, THE REBATE COMPUTATION WAS PERFORMED ON DECEMBER 3, 2012.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE K, PART IV, LINE 2C, COLUMN C</FormAndLineReferenceDesc>
        <ExplanationTxt>FOR BOND CUSIP #2548398N6, THE REBATE COMPUTATION WAS PERFORMED ON MAY 1, 2014. AN ADDITIONAL REBATE COMPUTATION WAS PERFORMED ON MAY 1, 2015.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleK>
    <IRS990ScheduleL documentId="IRS990ScheduleL">
      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>Ralph J Cicerone</PersonNm>
        <RelationshipWithOrgTxt>PRESIDENT</RelationshipWithOrgTxt>
        <LoanPurposeTxt>Purchase Residence</LoanPurposeTxt>
        <LoanFromOrganizationInd>X</LoanFromOrganizationInd>
        <OriginalPrincipalAmt>2250000</OriginalPrincipalAmt>
        <BalanceDueAmt>2250000</BalanceDueAmt>
        <DefaultInd>false</DefaultInd>
        <BoardOrCommitteeApprovalInd>true</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>true</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>C DAN MOTE JR</PersonNm>
        <RelationshipWithOrgTxt>PRESIDENT - NAE</RelationshipWithOrgTxt>
        <LoanPurposeTxt>PURCHASE RESIDENCE</LoanPurposeTxt>
        <LoanFromOrganizationInd>X</LoanFromOrganizationInd>
        <OriginalPrincipalAmt>1500000</OriginalPrincipalAmt>
        <BalanceDueAmt>1500000</BalanceDueAmt>
        <DefaultInd>false</DefaultInd>
        <BoardOrCommitteeApprovalInd>true</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>true</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <TotalBalanceDueAmt>3750000</TotalBalanceDueAmt>
    </IRS990ScheduleL>
    <IRS990ScheduleM documentId="IRS990ScheduleM">
      <WorksOfArtGrp />
      <ArtHistoricalTreasuresGrp />
      <ArtFractionalInterestGrp />
      <BooksAndPublicationsGrp />
      <ClothingAndHouseholdGoodsGrp />
      <CarsAndOtherVehiclesGrp />
      <BoatsAndPlanesGrp />
      <IntellectualPropertyGrp />
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>8</ContributionCnt>
        <NoncashContributionsRptF990Amt>195870</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>Sale Price</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <SecuritiesCloselyHeldStockGrp />
      <SecurPrtnrshpTrustIntrstsGrp />
      <SecuritiesMiscellaneousGrp />
      <QualifiedContribHistStructGrp />
      <QualifiedContribOtherGrp />
      <RealEstateResidentialGrp />
      <RealEstateCommercialGrp />
      <RealEstateOtherGrp />
      <CollectiblesGrp />
      <FoodInventoryGrp />
      <DrugsAndMedicalSuppliesGrp />
      <TaxidermyGrp />
      <HistoricalArtifactsGrp />
      <ScientificSpecimensGrp />
      <ArchaeologicalArtifactsGrp />
      <AnyPropertyThatMustBeHeldInd>false</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>true</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>true</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule M Line 32a</FormAndLineReferenceDesc>
        <ExplanationTxt>The organization utilizes a third-party investment firm to receive and sell donated securities.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="IRS990ScheduleO">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART VI, SECTION A, LINES 6, 7A AND 7B GOVERNANCE</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION IS A PRIVATE MEMBERSHIP ORGANIZATION. THE NAS CONSTITUTION PROVIDES THAT THE ACADEMY SHALL CONSIST OF MEMBERS, MEMBERS EMERITI AND FOREIGN ASSOCIATES. MEMBERS OF NAS ARE ELECTED BY THE MEMBERS IN RECOGNITION OF THEIR DISTINGUISHED AND CONTINUING ACHIEVEMENTS IN ORIGINAL RESEARCH. THE OFFICERS OF THE ACADEMY ARE CHOSEN FROM THE MEMBERSHIP, AND AMENDMENTS TO THE ORGANIZATION'S CONSTITUTION AND BYLAWS, AND ELECTION OF NEW MEMBERS, OFFICERS, AND COUNCIL MEMBERS REQUIRE A VOTE OF THE MEMBERS. THE OFFICERS OF THE ORGANIZATION, TOGETHER WITH TWELVE MEMBERS TO BE ELECTED, SHALL CONSTITUTE THE NATIONAL ACADEMY OF SCIENCES (NAS) COUNCIL FOR THE TRANSACTION OF SUCH BUSINESS AS MAY BE ASSIGNED TO IT BY THE CONSTITUTION, BYLAWS, OR THE MEMBERSHIP. THE NAS COUNCIL HAS GENERAL SUPERVISION OVER THE ELECTION OF THE OFFICERS OF THE ORGANIZATION, AND SHALL SET THE DATE FOR ELECTION AND APPOINTING NOMINATING COMMITTEES. THE NAS COUNCIL MAY DELEGATE ITS AUTHORITY TO APPROPRIATE OFFICIALS OF THE ORGANIZATION EXCEPT WITH RESPECT TO THOSE AUTHORITIES CONCERNING MEMBERSHIP AFFAIRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part VI, Section B, Line 11 Policies</FormAndLineReferenceDesc>
        <ExplanationTxt>The Draft 990 is prepared by the Office of the Chief Financial Officer. It is reviewed by the Office of General Counsel and an external tax advisor before being reviewed by the auditing committee. The final form is then provided to the full NAS Council prior to its submission.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part VI, Section B, Lines 12b, 12c Policies</FormAndLineReferenceDesc>
        <ExplanationTxt>ANNUALLY, THE GENERAL COUNSEL LEADS A DISCUSSION AT A MEETING OF OFFICERS AND DIRECTORS AT WHICH THE CONFLICT OF INTEREST POLICY IS REVIEWED. ALL OFFICERS/DIRECTORS ARE ASKED ABOUT ANY CURRENT CONFLICTS AND REQUIRED TO SIGN A STATEMENT THAT THEY UNDERSTAND AND WILL ABIDE BY ALL CONFLICT OF INTEREST POLICIES AND PROCEDURES. OFFICERS, COUNCIL MEMBERS, AND KEY EMPLOYEES ARE ALSO ASKED TO COMPLETE AN ANNUAL QUESTIONNAIRE REGARDING CERTAIN BUSINESS TRANSACTIONS THAT COULD POTENTIALLY RESULT IN A CONFLICT OF INTEREST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part VI, Section B, Line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>COMPENSATION DECISIONS FOR ALL DISQUALIFIED PERSONS AS DEFINED IN IRC SECTION 4958 ARE MADE ANNUALLY BY AN EXECUTIVE COMPENSATION COMMITTEE COMPOSED OF INDEPENDENT DIRECTORS ON THE BASIS OF EXECUTIVE COMPENSATION COMPATIBILITY DATA, INCLUDING A MARKET COMPENSATION SURVEY CONDUCTED BY THE OFFICE OF HUMAN RESOURCES THAT REVIEWS THE COMPENSATION OF THE HEADS OF THE LEADING UNIVERSITIES AND CHIEF EXECUTIVE OFFICERS OF SIMILAR ORGANIZATIONS. THERE IS A RECORD OF THE EXECUTIVE COMPENSATION COMMITTEE'S DELIBERATIONS AND DECISIONS. COMPENSATION DECISIONS ARE MADE ANNUALLY FOR OTHER KEY AND HIGH PAID EMPLOYEES BY A COMMITTEE OF SENIOR STAFF ON THE BASIS OF COMPARIBILITY DATA.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part VI, Section C Disclosure, Line 17</FormAndLineReferenceDesc>
        <ExplanationTxt>NAS files returns in the states listed on the 990 Part VI Section C Line 17. In addition, NAS files charitable solicitation registrations with a 990 attached in the following states: AL, AK, AR, CO, FL, GA, HI, KY, ME, MA, MI, MN, MS, NH, NJ, NM, ND, OH, OK, PA, RI, TN, UT, WA, WV, WI.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part VI, Section C Disclosure, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>NAS makes its governing documents, conflict of interest policy, and financial statements available to the public upon request. THE GOVERNING DOCUMENTS AND ANNUAL FINANCIAL STATEMENTS ARE ALSO AVAILABLE ON THE ORGANIZATION'S WEBSITE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XI, Line 9</FormAndLineReferenceDesc>
        <ExplanationTxt>Amount consists of (589,485) of unrealized loss on derivatives and unrealized loss on charitable gift annuities.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>GULF RESEARCH PROGRAM: SIGNIFICANT INCREASE IN NET ASSETS &amp; REVENUE</FormAndLineReferenceDesc>
        <ExplanationTxt>PART X BALANCE SHEET LINES 3 &amp; 28 THE US GOVERNEMENT ANNOUNCED IN 2012 AND EARLY 2013 TWO SETTLEMENT AGREEMENTS CONCERNING THE 2010 DEEPWATER HORIZON DISASTER, ONE WITH BP EXPLORATION AND PRODUCTION INC (BP) AND THE OTHER WITH TRANSOCEAN DEEPWATER, INC (TRANSOCEAN). AS PART OF THESE SETTLEMENT AGREEMENTS, NAS WILL RECEIVE $500 MILLION OVER A 5-YEAR PERIOD TO ESTABLISH A NEW 30-YEAR PROGRAM ON HUMAN HEALTH AND ENVIRONMENTAL PROTECTION IN THE GULF OF MEXICO. BP WILL PAY $350 MILLION OVER 5-YEARS AND TRANSOCEAN WILL PAY $150 MILLION OVER 4-YEARS UNDER THE TERMS OF THE RESPECTIVE SETTLEMENT AGREEMENTS, WHICH AMOUNTS WILL BE INVESTED AND WILL BE FULLY EXPENDED BY THE END OF THE 30-YEAR PERIOD. PRESENT VALUE OF THE BALANCE OF THESE PAYMENTS IS $452.9 MILLION AS OF DECEMBER 31, 2014. THE UNPAID BALANCE DUE FOR EACH AGREEMENT IS REFLECTED IN PLEDGES AND GRANTS RECEIVABLE, NET.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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      <IdDisregardedEntitiesGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>NAS Title Holding LLC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>5635 Bent Branch Road</AddressLine1Txt>
          <CityNm>Bethesda</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
          <ZIPCd>20816</ZIPCd>
        </USAddress>
        <EIN>530196932</EIN>
        <PrimaryActivitiesTxt>Title Holding</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MD</LegalDomicileStateCd>
        <TotalIncomeAmt>0</TotalIncomeAmt>
        <EndOfYearAssetsAmt>123236297</EndOfYearAssetsAmt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>NAS</BusinessNameLine1Txt>
        </DirectControllingEntityName>
      </IdDisregardedEntitiesGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>The National Academies Corporation</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>100 ACADEMY</AddressLine1Txt>
          <CityNm>Irvine</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>92617</ZIPCd>
        </USAddress>
        <EIN>942994279</EIN>
        <PrimaryActivitiesTxt>Support Org</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>CA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>11a</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>NAS</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>true</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>NAS Retiree Welfare Benefit Plan Trust</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>2101 CONSTITUTION AVENUE NW</AddressLine1Txt>
          <CityNm>WASHINGTON</CityNm>
          <StateAbbreviationCd>DC</StateAbbreviationCd>
          <ZIPCd>20418</ZIPCd>
        </USAddress>
        <EIN>526976965</EIN>
        <PrimaryActivitiesTxt>Support Org</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DC</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>11a</PublicCharityStatusTxt>
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          <BusinessNameLine1Txt>NAS</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>true</ControlledOrganizationInd>
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      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>National Academy of Engineering Fund</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>2101 CONSTITUTION AVENUE NW</AddressLine1Txt>
          <CityNm>WASHINGTON</CityNm>
          <StateAbbreviationCd>DC</StateAbbreviationCd>
          <ZIPCd>20418</ZIPCd>
        </USAddress>
        <EIN>237284092</EIN>
        <PrimaryActivitiesTxt>Support Org</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DC</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>11a</PublicCharityStatusTxt>
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          <BusinessNameLine1Txt>NAS</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>true</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>false</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>false</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>true</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>false</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>false</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>false</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>false</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>false</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>false</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>false</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>false</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>true</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>false</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>true</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>true</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>false</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>true</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>true</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>false</TransferFromOtherOrgInd>
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          <BusinessNameLine1Txt>THE NATIONAL ACADEMIES CORPORATION</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>Q</TransactionTypeTxt>
        <InvolvedAmt>58711</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>CASH</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>RETIREE WELFARE BENEFIT PLAN TRUST</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>R</TransactionTypeTxt>
        <InvolvedAmt>216195</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>CASH</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>National Academy of Engineering Fund</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>c</TransactionTypeTxt>
        <InvolvedAmt>4932108</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>CASH</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
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          <BusinessNameLine1Txt>National Academy of Engineering Fund</BusinessNameLine1Txt>
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        <TransactionTypeTxt>Q</TransactionTypeTxt>
        <InvolvedAmt>1686761</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>CASH</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
    </IRS990ScheduleR>
  </ReturnData>
</Return>