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          <AverageHrsPerWkDevotedToPosRt>1.0</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
          <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
          <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>MICHAEL BROWN</PersonNm>
          <USAddress>
            <AddressLine1Txt>5109 Cherry Street</AddressLine1Txt>
            <CityNm>Kansas City</CityNm>
            <StateAbbreviationCd>MO</StateAbbreviationCd>
            <ZIPCd>64110</ZIPCd>
          </USAddress>
          <TitleTxt>TRUSTEE</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.4</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
          <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
          <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>NICHOLAS POWELL</PersonNm>
          <USAddress>
            <AddressLine1Txt>5109 Cherry Street</AddressLine1Txt>
            <CityNm>Kansas City</CityNm>
            <StateAbbreviationCd>MO</StateAbbreviationCd>
            <ZIPCd>64110</ZIPCd>
          </USAddress>
          <TitleTxt>TRUSTEE</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.4</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
          <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
          <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>STEPHEN D DUNN</PersonNm>
          <USAddress>
            <AddressLine1Txt>5109 Cherry Street</AddressLine1Txt>
            <CityNm>Kansas City</CityNm>
            <StateAbbreviationCd>MO</StateAbbreviationCd>
            <ZIPCd>64110</ZIPCd>
          </USAddress>
          <TitleTxt>Trustee</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.4</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
          <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
          <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>MICHELE KNIGHT</PersonNm>
          <USAddress>
            <AddressLine1Txt>5109 Cherry Street</AddressLine1Txt>
            <CityNm>Kansas City</CityNm>
            <StateAbbreviationCd>MO</StateAbbreviationCd>
            <ZIPCd>64110</ZIPCd>
          </USAddress>
          <TitleTxt>SR VP ENGAGEMENT</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>40.0</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>193564</CompensationAmt>
          <EmployeeBenefitProgramAmt>12508</EmployeeBenefitProgramAmt>
          <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>Alejandro Sanchez Alvarado</PersonNm>
          <USAddress>
            <AddressLine1Txt>5109 Cherry Street</AddressLine1Txt>
            <CityNm>Kansas City</CityNm>
            <StateAbbreviationCd>MO</StateAbbreviationCd>
            <ZIPCd>64110</ZIPCd>
          </USAddress>
          <TitleTxt>Trustee</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.4</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
          <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
          <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>BRIAN GORDON</PersonNm>
          <USAddress>
            <AddressLine1Txt>5109 Cherry Street</AddressLine1Txt>
            <CityNm>Kansas City</CityNm>
            <StateAbbreviationCd>MO</StateAbbreviationCd>
            <ZIPCd>64110</ZIPCd>
          </USAddress>
          <TitleTxt>Chief Financial Officer</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>40.0</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>174285</CompensationAmt>
          <EmployeeBenefitProgramAmt>20606</EmployeeBenefitProgramAmt>
          <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>Curt Gridley</PersonNm>
          <USAddress>
            <AddressLine1Txt>5109 Cherry Street</AddressLine1Txt>
            <CityNm>Kansas City</CityNm>
            <StateAbbreviationCd>MO</StateAbbreviationCd>
            <ZIPCd>64110</ZIPCd>
          </USAddress>
          <TitleTxt>Trustee</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.4</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
          <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
          <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
        </OfficerDirTrstKeyEmplGrp>
        <OfficerDirTrstKeyEmplGrp>
          <PersonNm>Niles Jager</PersonNm>
          <USAddress>
            <AddressLine1Txt>5109 Cherry Street</AddressLine1Txt>
            <CityNm>Kansas City</CityNm>
            <StateAbbreviationCd>MO</StateAbbreviationCd>
            <ZIPCd>64110</ZIPCd>
          </USAddress>
          <TitleTxt>Trustee</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>0.4</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>0</CompensationAmt>
          <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
          <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
        </OfficerDirTrstKeyEmplGrp>
        <CompensationHighestPaidEmplGrp>
          <PersonNm>JANE DAVIS</PersonNm>
          <USAddress>
            <AddressLine1Txt>5109 CHERRY STREET</AddressLine1Txt>
            <CityNm>KANSAS CITY</CityNm>
            <StateAbbreviationCd>MO</StateAbbreviationCd>
            <ZIPCd>64110</ZIPCd>
          </USAddress>
          <TitleTxt>VP ACCESS/DIGITAL SV</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>40.0</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>117089</CompensationAmt>
          <EmployeeBenefitsAmt>7338</EmployeeBenefitsAmt>
          <ExpenseAccountAmt>0</ExpenseAccountAmt>
        </CompensationHighestPaidEmplGrp>
        <CompensationHighestPaidEmplGrp>
          <PersonNm>JASON DEAN</PersonNm>
          <USAddress>
            <AddressLine1Txt>5109 CHERRY STREET</AddressLine1Txt>
            <CityNm>KANSAS CITY</CityNm>
            <StateAbbreviationCd>MO</StateAbbreviationCd>
            <ZIPCd>64110</ZIPCd>
          </USAddress>
          <TitleTxt>VP SPEC. COLLECTIONS</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>40.0</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>112323</CompensationAmt>
          <EmployeeBenefitsAmt>9499</EmployeeBenefitsAmt>
          <ExpenseAccountAmt>0</ExpenseAccountAmt>
        </CompensationHighestPaidEmplGrp>
        <CompensationHighestPaidEmplGrp>
          <PersonNm>MARK EVILSIZOR</PersonNm>
          <USAddress>
            <AddressLine1Txt>5109 CHERRY STREET</AddressLine1Txt>
            <CityNm>KANSAS CITY</CityNm>
            <StateAbbreviationCd>MO</StateAbbreviationCd>
            <ZIPCd>64110</ZIPCd>
          </USAddress>
          <TitleTxt>HEAD OF IT SERVICES</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>40.0</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>111478</CompensationAmt>
          <EmployeeBenefitsAmt>13818</EmployeeBenefitsAmt>
          <ExpenseAccountAmt>0</ExpenseAccountAmt>
        </CompensationHighestPaidEmplGrp>
        <CompensationHighestPaidEmplGrp>
          <PersonNm>ERIC WARD</PersonNm>
          <USAddress>
            <AddressLine1Txt>5109 CHERRY STREET</AddressLine1Txt>
            <CityNm>KANSAS CITY</CityNm>
            <StateAbbreviationCd>MO</StateAbbreviationCd>
            <ZIPCd>64110</ZIPCd>
          </USAddress>
          <TitleTxt>VP PROGRAMMING</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>40.0</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>106601</CompensationAmt>
          <EmployeeBenefitsAmt>13512</EmployeeBenefitsAmt>
          <ExpenseAccountAmt>0</ExpenseAccountAmt>
        </CompensationHighestPaidEmplGrp>
        <CompensationHighestPaidEmplGrp>
          <PersonNm>JASON MOULIN</PersonNm>
          <USAddress>
            <AddressLine1Txt>5109 CHERRY STREET</AddressLine1Txt>
            <CityNm>KANSAS CITY</CityNm>
            <StateAbbreviationCd>MO</StateAbbreviationCd>
            <ZIPCd>64110</ZIPCd>
          </USAddress>
          <TitleTxt>ACCOUNTING MANAGER</TitleTxt>
          <AverageHrsPerWkDevotedToPosRt>40.0</AverageHrsPerWkDevotedToPosRt>
          <CompensationAmt>95551</CompensationAmt>
          <EmployeeBenefitsAmt>12849</EmployeeBenefitsAmt>
          <ExpenseAccountAmt>0</ExpenseAccountAmt>
        </CompensationHighestPaidEmplGrp>
        <OtherEmployeePaidOver50kCnt>16</OtherEmployeePaidOver50kCnt>
        <CompensationOfHghstPdCntrctGrp>
          <BusinessName>
            <BusinessNameLine1Txt>Cambridge Associates</BusinessNameLine1Txt>
          </BusinessName>
          <USAddress>
            <AddressLine1Txt>100 Summer Street</AddressLine1Txt>
            <CityNm>BOSTON</CityNm>
            <StateAbbreviationCd>MA</StateAbbreviationCd>
            <ZIPCd>021102112</ZIPCd>
          </USAddress>
          <ServiceTypeTxt>Investment Advisor</ServiceTypeTxt>
          <CompensationAmt>534302</CompensationAmt>
        </CompensationOfHghstPdCntrctGrp>
        <CompensationOfHghstPdCntrctGrp>
          <BusinessName>
            <BusinessNameLine1Txt>Kronley &amp; Associates</BusinessNameLine1Txt>
          </BusinessName>
          <USAddress>
            <AddressLine1Txt>1800 JOHN F KENNEDY BOULEVARD</AddressLine1Txt>
            <CityNm>PHILADELPHIA</CityNm>
            <StateAbbreviationCd>PA</StateAbbreviationCd>
            <ZIPCd>19103</ZIPCd>
          </USAddress>
          <ServiceTypeTxt>CONSULTANT</ServiceTypeTxt>
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        </CompensationOfHghstPdCntrctGrp>
        <CompensationOfHghstPdCntrctGrp>
          <BusinessName>
            <BusinessNameLine1Txt>FORVIS LLP</BusinessNameLine1Txt>
          </BusinessName>
          <USAddress>
            <AddressLine1Txt>1201 Walnut St Suite 1700</AddressLine1Txt>
            <CityNm>KANSAS CITY</CityNm>
            <StateAbbreviationCd>MO</StateAbbreviationCd>
            <ZIPCd>64106</ZIPCd>
          </USAddress>
          <ServiceTypeTxt>Accounting &amp; Audit</ServiceTypeTxt>
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        </CompensationOfHghstPdCntrctGrp>
        <CompensationOfHghstPdCntrctGrp>
          <BusinessName>
            <BusinessNameLine1Txt>Tweedy Browne</BusinessNameLine1Txt>
          </BusinessName>
          <USAddress>
            <AddressLine1Txt>350 Park Ave</AddressLine1Txt>
            <CityNm>NEW YORK</CityNm>
            <StateAbbreviationCd>NY</StateAbbreviationCd>
            <ZIPCd>10022</ZIPCd>
          </USAddress>
          <ServiceTypeTxt>investment mgmt</ServiceTypeTxt>
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        <CompensationOfHghstPdCntrctGrp>
          <BusinessName>
            <BusinessNameLine1Txt>MBB AGENCY</BusinessNameLine1Txt>
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          <USAddress>
            <AddressLine1Txt>7820 Foster Street</AddressLine1Txt>
            <CityNm>OVERLAND PARK</CityNm>
            <StateAbbreviationCd>KS</StateAbbreviationCd>
            <ZIPCd>66204</ZIPCd>
          </USAddress>
          <ServiceTypeTxt>CONSULTANT</ServiceTypeTxt>
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        </CompensationOfHghstPdCntrctGrp>
        <ContractorPaidOver50kCnt>2</ContractorPaidOver50kCnt>
      </OfficerDirTrstKeyEmplInfoGrp>
      <SummaryOfDirectChrtblActyGrp>
        <Description1Txt>ACQUIRED AND MAINTAINED THE OPERATING ASSETS OF A SCIENCE, ENGINEERING, AND TECHNOLOGY LIBRARY. A TOTAL OF 3,128 PATRONS VISITED THE LIBRARY IN 2022 BOTH IN-PERSON &amp; ONLINE.</Description1Txt>
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        <Description2Txt>PRODUCED A TOTAL OF 67 EDUCATIONAL LECTURES AND PUBLIC PROGRAMS THAT ATTRACED 22,154 ATTENDEES. THE LIBRARY ALSO PRODUCED FIVE EXHIBITIONS IN 2022.</Description2Txt>
        <Expenses2Amt>265087</Expenses2Amt>
        <Description3Txt>HOSTED 20 RESEARCH FELLOWS IN PARTNERSHIP WITH LINDA HALL FOUNDATION. FELLOWS ARE SELECTED THROUGH A COMPETITIVE APPL- ICATION PROCESS. FELLOWSHIPS RANGE FROM 1 WEEK TO 4 MONTHS.</Description3Txt>
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      </SummaryOfDirectChrtblActyGrp>
      <SumOfProgramRelatedInvstGrp />
      <MinimumInvestmentReturnGrp>
        <AverageMonthlyFMVOfSecAmt>33085671</AverageMonthlyFMVOfSecAmt>
        <AverageMonthlyCashBalancesAmt>146228</AverageMonthlyCashBalancesAmt>
        <FMVAllOtherNoncharitableAstAmt>206448724</FMVAllOtherNoncharitableAstAmt>
        <TotalFMVOfUnusedAssetsAmt>239680623</TotalFMVOfUnusedAssetsAmt>
        <AcquisitionIndebtednessAmt>0</AcquisitionIndebtednessAmt>
        <AdjustedTotalFMVOfUnusedAstAmt>239680623</AdjustedTotalFMVOfUnusedAstAmt>
        <CashDeemedCharitableAmt>3595209</CashDeemedCharitableAmt>
        <NetVlNoncharitableAssetsAmt>236085414</NetVlNoncharitableAssetsAmt>
        <MinimumInvestmentReturnAmt>11804271</MinimumInvestmentReturnAmt>
      </MinimumInvestmentReturnGrp>
      <DistributableAmountGrp>
        <Sect4942j3j5FndtnAndFrgnOrgInd>X</Sect4942j3j5FndtnAndFrgnOrgInd>
      </DistributableAmountGrp>
      <PFQualifyingDistributionsGrp>
        <ExpensesAndContributionsAmt>10077193</ExpensesAndContributionsAmt>
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        <CharitableAssetsAcquisPaidAmt>767652</CharitableAssetsAcquisPaidAmt>
        <SetAsideSuitabilityTestAmt>0</SetAsideSuitabilityTestAmt>
        <SetAsideCashDistriTestAmt>0</SetAsideCashDistriTestAmt>
        <QualifyingDistributionsAmt>10844845</QualifyingDistributionsAmt>
      </PFQualifyingDistributionsGrp>
      <PrivateOperatingFoundationsGrp>
        <PrivateOperatingFndtnRulingDt>1986-03-21</PrivateOperatingFndtnRulingDt>
        <Section4942j3Ind>X</Section4942j3Ind>
        <LessorAdjNetIncmMinInvstRetGrp>
          <CurrentYearAmt>3204067</CurrentYearAmt>
          <Year1Amt>5188869</Year1Amt>
          <Year2Amt>2854689</Year2Amt>
          <Year3Amt>2112212</Year3Amt>
          <TotalAmt>13359837</TotalAmt>
        </LessorAdjNetIncmMinInvstRetGrp>
        <Pct85LessorAdjIncmOrMinRetGrp>
          <CurrentYearAmt>2723457</CurrentYearAmt>
          <Year1Amt>4410539</Year1Amt>
          <Year2Amt>2426486</Year2Amt>
          <Year3Amt>1795380</Year3Amt>
          <TotalAmt>11355862</TotalAmt>
        </Pct85LessorAdjIncmOrMinRetGrp>
        <QualifyingDistributionsGrp>
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          <Year1Amt>10573110</Year1Amt>
          <Year2Amt>10069700</Year2Amt>
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          <Year2Amt>10069700</Year2Amt>
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          <Year2Amt>6238005</Year2Amt>
          <Year3Amt>6360431</Year3Amt>
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        <TotalSupportGrp>
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        </TotalSupportGrp>
        <PublicSupportType>
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        </PublicSupportType>
        <LargestSupportFromEOGrp>
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        <GrossInvestmentIncomeGrp>
          <TotalAmt>0</TotalAmt>
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      </PrivateOperatingFoundationsGrp>
      <SupplementaryInformationGrp>
        <ApplicationSubmissionInfoGrp>
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          <RecipientUSAddress>
            <AddressLine1Txt>5109 Cherry St</AddressLine1Txt>
            <CityNm>Kansas City</CityNm>
            <StateAbbreviationCd>MO</StateAbbreviationCd>
            <ZIPCd>64110</ZIPCd>
          </RecipientUSAddress>
          <RecipientEmailAddressTxt>fellowships@lindahall.org</RecipientEmailAddressTxt>
          <FormAndInfoAndMaterialsTxt>Application instructions are on website: www.lindahall.org/fellowships</FormAndInfoAndMaterialsTxt>
          <SubmissionDeadlinesTxt>Varies. See website for current year deadline.</SubmissionDeadlinesTxt>
          <RestrictionsOnAwardsTxt>Pre- and post-doctoral scholars are eligible. See details on website.</RestrictionsOnAwardsTxt>
        </ApplicationSubmissionInfoGrp>
      </SupplementaryInformationGrp>
      <AnalysisIncomeProducingActyGrp>
        <ProgramServiceRevenueDtl>
          <Desc>DOCUMENT SERVICES INCOME</Desc>
          <RelatedOrExemptFunctionIncmAmt>168639</RelatedOrExemptFunctionIncmAmt>
        </ProgramServiceRevenueDtl>
        <ProgramServiceRevenueDtl>
          <Desc>MAINTENANCE FEES-CENTER FOR RESEARCH LIB</Desc>
          <RelatedOrExemptFunctionIncmAmt>119569</RelatedOrExemptFunctionIncmAmt>
        </ProgramServiceRevenueDtl>
        <FeesContractsFromGovtAgGrp />
        <MembershipDuesAndAssmntGrp />
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        <NetRntlIncmReNotDebtFincdProp />
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        <GrossProfitLossSlsOfInvntryGrp />
        <OtherRevenueDescribedGrp>
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        <OtherRevenueDescribedGrp>
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          <RelatedOrExemptFunctionIncmAmt>329090</RelatedOrExemptFunctionIncmAmt>
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        <RlnOfActyToAccomOfExmptPrpsGrp>
          <LineNumberTxt>11B</LineNumberTxt>
          <RelationshipStatementTxt>The library has an information technology-sharing agreement with the Spencer Art Reference Library. Fees for the implementation and maintenance of the integrated library system are paid by the Linda Hall Library and the SARL reimburses LHL for its share of the cost.</RelationshipStatementTxt>
        </RlnOfActyToAccomOfExmptPrpsGrp>
      </RlnOfActyToAccomOfExmptPrpsGrp>
      <TrnsfrTransRlnNonchrtblEOGrp>
        <TrnsfrOfCashToNonchrtblEOInd>false</TrnsfrOfCashToNonchrtblEOInd>
        <TrnsfrOtherAssetNonchrtblEOInd>false</TrnsfrOtherAssetNonchrtblEOInd>
        <SalesOrExchangesOfAssetsInd>false</SalesOrExchangesOfAssetsInd>
        <PurchaseOfAssetsNonchrtblEOInd>false</PurchaseOfAssetsNonchrtblEOInd>
        <RentalOfFacilitiesOthAssetsInd>false</RentalOfFacilitiesOthAssetsInd>
        <ReimbursementArrangementsInd>false</ReimbursementArrangementsInd>
        <LoansOrLoanGuaranteesInd>false</LoansOrLoanGuaranteesInd>
        <PerformanceOfServicesEtcInd>false</PerformanceOfServicesEtcInd>
        <SharingOfFacilitiesEtcInd>false</SharingOfFacilitiesEtcInd>
        <RelationshipsNonchrtblEOInd>false</RelationshipsNonchrtblEOInd>
      </TrnsfrTransRlnNonchrtblEOGrp>
    </IRS990PF>
    <IRS990ScheduleB documentId="IRS990ScheduleB">
      <Organization501c3ExemptPFInd>X</Organization501c3ExemptPFInd>
      <GeneralRuleInd>X</GeneralRuleInd>
      <ContributorInformationGrp>
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