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        <PersonNm>Glen S Kazerman</PersonNm>
        <TitleTxt>Member</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>STANLEY J KRASKA JR</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Richard E Levine</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Kevin W Liles</PersonNm>
        <TitleTxt>MemBER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN A LUETKEMEYER JR</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN O MITCHELL IV</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>COURTNEY S MULLER</PersonNm>
        <TitleTxt>MEMBER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Callie J Rahman</PersonNm>
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        <PersonNm>HENRY A ROSENBERG JR</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>David D Rothschild</PersonNm>
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        <PersonNm>RICHARD B SILBERSTEIN</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>J Matthew Stover</PersonNm>
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        <PersonNm>Taymour Tamaddon</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>CLIVE WILLIAMS</PersonNm>
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        <PersonNm>SAMUEL H WRIGHT</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>CHARLES W BRITTON</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Sherri Voelkel</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>John Brad Shelley</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Cecilia Millar</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Darren Ford</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Eunice Deegan</PersonNm>
        <TitleTxt>Co-Director of Athletics</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>WILLIAM RUSH</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Barbara Robins</PersonNm>
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          <BusinessName>
            <BusinessNameLine1Txt>SAGE DINING SERVICES</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1402 YORK ROAD 100</AddressLine1Txt>
            <CityNm>LUTHERVILLE</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
            <ZIPCd>21093</ZIPCd>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
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        <ContractorAddress>
          <USAddress>
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            <CityNm>TIMONIUM</CityNm>
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            <ZIPCd>21093</ZIPCd>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>David S Brown Enterprises</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO Box 548</AddressLine1Txt>
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            <StateAbbreviationCd>MD</StateAbbreviationCd>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>West End Service Inc</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>8600 Frederick Road</AddressLine1Txt>
            <CityNm>Ellicott City</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
            <ZIPCd>21041</ZIPCd>
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        </ContractorAddress>
        <ServicesDesc>Vehicle repairs/maintenance</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>Aroisa &amp; Company LLC</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>16 Stenerson LA 3A</AddressLine1Txt>
            <CityNm>Hunt Valley</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
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      <ProgramServiceRevenueGrp>
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        <Desc>Student Support</Desc>
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      <ProgramServiceRevenueGrp>
        <Desc>campus housing</Desc>
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        <ExclusionAmt>191103</ExclusionAmt>
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      <FundraisingDirectExpensesAmt>27661</FundraisingDirectExpensesAmt>
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        <TotalRevenueColumnAmt>-5611</TotalRevenueColumnAmt>
        <ExclusionAmt>-5611</ExclusionAmt>
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        <ExclusionAmt>71154</ExclusionAmt>
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        <Desc>Miscellaneous Revenue</Desc>
        <BusinessCd>611710</BusinessCd>
        <TotalRevenueColumnAmt>144396</TotalRevenueColumnAmt>
        <ExclusionAmt>144396</ExclusionAmt>
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      <OtherRevenueMiscGrp>
        <Desc>Insurance Proceeds</Desc>
        <BusinessCd>611710</BusinessCd>
        <TotalRevenueColumnAmt>10788</TotalRevenueColumnAmt>
        <ExclusionAmt>10788</ExclusionAmt>
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      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>63355886</TotalRevenueColumnAmt>
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        <ExclusionAmt>11589499</ExclusionAmt>
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      <GrantsToDomesticIndividualsGrp>
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        <ProgramServicesAmt>8840354</ProgramServicesAmt>
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        <ManagementAndGeneralAmt>773783</ManagementAndGeneralAmt>
        <FundraisingAmt>140180</FundraisingAmt>
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        <TotalAmt>22444113</TotalAmt>
        <ProgramServicesAmt>19882794</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1639351</ManagementAndGeneralAmt>
        <FundraisingAmt>921968</FundraisingAmt>
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      <PensionPlanContributionsGrp>
        <TotalAmt>1099813</TotalAmt>
        <ProgramServicesAmt>955857</ProgramServicesAmt>
        <ManagementAndGeneralAmt>101057</ManagementAndGeneralAmt>
        <FundraisingAmt>42899</FundraisingAmt>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part III, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>Artwork and Antiques are available to provide students with art education enrichment.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SCHOOL'S ENDOWMENTS CONSIST OF VARIOUS FUNDS ESTABLISHED TO SUPPORT A VARIETY OF SCHOLARSHIPS and professional development AT THE SCHOOL.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part X, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>ASC 740, INCOME TAXES, PRESCRIBES A RECOGNITION THRESHOLD AND A MEASUREMENT ATTRIBUTE FOR THE FINANCIAL STATEMENT RECOGNITION AND MEASUREMENT OF TAX POSITIONS TAKEN OR EXPECTED TO BE TAKEN IN A TAX RETURN, AS WELL AS GUIDANCE ON DE-RECOGNITION, CLASSIFICATION, INTEREST AND PENALTIES AND FINANCIAL STATEMENT REPORTING DISCLOSURES. FOR THESE BENEFITS TO BE RECOGNIZED, A TAX POSITION MUST BE MORE LIKELY-THAN NOT TO BE SUSTAINED UPON EXAMINATION BY TAXING AUTHORITIES. THE AMOUNT RECOGNIZED IS MEASURED AS THE LARGEST AMOUNT OF BENEFIT THAT IS GREATER THAN FIFTY PERCENT LIKELY OF BEING REALIZED UPON ULTIMATE SETTLEMENT. THE SCHOOL RECOGNIZES INTEREST AND PENALTIES ACCRUED ON ANY UNRECOGNIZED TAX EXPOSURES AS A COMPONENT OF INCOME TAX EXPENSE. THE SCHOOL DOES NOT HAVE ANY AMOUNTS ACCRUED RELATING TO INTEREST AND PENALTIES AS OF JUNE 30, 2017 AND 2016.</ExplanationTxt>
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      <SupplementalInformationDetail>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>Financial Aid Expense Netted with Revenue 8,840,354. Investment Expenses Netted with Investment Revenue 63,745. Cost of Goods Sold -155,995. Special Event Expense -27,661. Rental Expenses -356,986. Loss on Sale of Assets -442,533.</ExplanationTxt>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>rental expenses netted with rental income 356,986. Change in Market Value of Interest Rate Swap -462,577. Special Event Expenses 27,661. Cost of Good Sold 155,995. FINANCIAL AID EXPENSE netted with revenue -8,840,354. Impairment Loss 339,698.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XII, Line 4b - Other Adjustments:</FormAndLineReferenceDesc>
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      <AccountActivitiesOutsideUSGrp>
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      <AccountActivitiesOutsideUSGrp>
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        <EmployeeCnt>0</EmployeeCnt>
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      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>north America - Canada and Mexico, but not the United States</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
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        <TypeOfActivitiesConductedTxt>Alumni Directory Service Fee</TypeOfActivitiesConductedTxt>
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      <ReviewProcessUnusualNCGiftsInd>1</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS REVIEWED AND APPROVED BY THE AUDIT COMMITTEE. AFTER THAT REVIEW, THE FORM 990 IS POSTED ON THE TRUSTEE WEBSITE FOR APPROVAL BEFORE IT IS FILED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>COPIES OF THE CONFLICT OF INTEREST POLICY AND RELATED QUESTIONNAIRE ARE SUBMITTED TO ALL INTERESTED PARTIES TO REVIEW, COMPLETE, AND SIGN. THE QUESTIONNAIRE WHICH DISCLOSES, IF APPLICABLE, ANY POTENTIAL CONFLICTS, IS SUBMITTED TO THE VICE PRESIDENT OF THE BOARD OF TRUSTEES FOR REVIEW. ANY POTENTIAL CONFLICTS ARE RESOLVED BY THE EXECUTIVE COMMITTEE OF THE BOARD OF TRUSTEES. THE CONFLICT OF INTEREST POLICY IS ANNUALLY REVIEWED BY THE GOVERNANCE COMMITTEE OF THE BOARD OF TRUSTEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>MCDONOGH SCHOOL MAINTAINS AN EXECUTIVE COMPENSATION POLICY FOR DETERMINING COMPENSATION FOR BOTH OFFICERS AND KEY EMPLOYEES. MCDONOGH SCHOOL USES PEER DATA PROVIDED BY IRS FORM 990 AND DATA PROVIDED BY BOTH AIMS (ASSOCIATION OF INDEPENDENT MARYLAND SCHOOLS) AND NAIS (NATIONAL ASSOCIATION OF INDEPENDENT SCHOOLS) FOR COMPARABILITY PURPOSES. THE INDEPENDENT BOARD HIRES AND DETERMINES COMPENSATION OF THE HEADMASTER, WHO THEN HIRES AND DETERMINES COMPENSATION OF OTHER TOP MANAGEMENT OFFICIALS, OFFICERS, AND KEY EMPLOYEES. ALL COMPENSATION IS DETERMINED BASED ON PERFORMANCE, COMPARABLE COMPENSATION DATA, AND BUDGETARY GUIDELINES AS APPROVED BY COMMITTEES OF THE BOARD OF TRUSTEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICIES, AND FINANCIAL STATEMENTS ARE MADE AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XI, line 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>change in market value of INTEREST RATE SWAP 462,577. change in value of assets held in annuity trusts -11,628. change in value of annuities payable 30,351. Change in Charitable Remainder Unitrust 678,167. Change in Value of Trust &amp; Gift Annuities 100,164. Impairment Loss -339,698.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 12, PART XII, LINE 2C:</FormAndLineReferenceDesc>
        <ExplanationTxt>THIS PROCESS HAS NOT CHANGED FROM THE PRIOR YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>po box 380</AddressLine1Txt>
          <CityNm>owings mills</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
          <ZIPCd>21117</ZIPCd>
        </USAddress>
        <EIN>275349063</EIN>
        <PrimaryActivitiesTxt>School performance appraisal software</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MD</LegalDomicileStateCd>
        <TotalIncomeAmt>244278</TotalIncomeAmt>
        <EndOfYearAssetsAmt>299572</EndOfYearAssetsAmt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>mcdonogh school incorporated</BusinessNameLine1Txt>
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          <BusinessNameLine1Txt>MCDONOGH PARENTS ASSOCIATION</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>PO BOX 380</AddressLine1Txt>
          <CityNm>OWINGS MILLS</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
          <ZIPCd>21117</ZIPCd>
        </USAddress>
        <EIN>526019724</EIN>
        <PrimaryActivitiesTxt>TO SUPPORT MCDONOGH SCHOOL</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MD</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>12</PublicCharityStatusTxt>
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        <RelatedOrganizationName>
          <BusinessNameLine1Txt>CHARITABLE REMAINDER UNITRUST (4)</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>PO BOX 380</AddressLine1Txt>
          <CityNm>OWINGS MILLS</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
          <ZIPCd>21117</ZIPCd>
        </USAddress>
        <PrimaryActivitiesTxt>CHARITABLE REMAINDER UNITRUST</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MD</LegalDomicileStateCd>
        <EntityTypeTxt>T</EntityTypeTxt>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
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      <GiftGrntOrCapContriToOthOrgInd>0</GiftGrntOrCapContriToOthOrgInd>
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      <RentalOfFacilitiesToOthOrgInd>0</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>0</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>0</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>1</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>0</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>0</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>0</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>0</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
    </IRS990ScheduleR>
  </ReturnData>
</Return>