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      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>1</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <CntrctRcvdGreaterThan100KCnt>0</CntrctRcvdGreaterThan100KCnt>
      <ProgramServiceRevenueGrp>
        <Desc>REFERENCE SERVICES</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>20567119</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>20567119</RelatedOrExemptFuncIncomeAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>ADMIN CONTRACTS</Desc>
        <BusinessCd>561000</BusinessCd>
        <TotalRevenueColumnAmt>1548905</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1548905</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>RIDES DELIVERY</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>1190236</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1190236</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>CONSULTING</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>214183</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>214183</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>MEMBERSHIP</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>104075</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>104075</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <TotalOthProgramServiceRevGrp>
        <TotalRevenueColumnAmt>85217</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>85217</RelatedOrExemptFuncIncomeAmt>
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      <TotalProgramServiceRevenueAmt>23709735</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>444305</TotalRevenueColumnAmt>
        <ExclusionAmt>444305</ExclusionAmt>
      </InvestmentIncomeGrp>
      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>1924679</SecuritiesAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>1176255</SecuritiesAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>748424</SecuritiesAmt>
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      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>748424</TotalRevenueColumnAmt>
        <ExclusionAmt>748424</ExclusionAmt>
      </NetGainOrLossInvestmentsGrp>
      <OtherRevenueMiscGrp>
        <Desc>AMEX EXPRESS POINTS REDEEMED</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>172</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>172</RelatedOrExemptFuncIncomeAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueTotalAmt>172</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>24902636</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>23709907</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>1192729</ExclusionAmt>
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      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>176160</TotalAmt>
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        <ManagementAndGeneralAmt>48973</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>99907</ProgramServicesAmt>
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      <OtherEmployeeBenefitsGrp>
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        <ProgramServicesAmt>217972</ProgramServicesAmt>
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        <ManagementAndGeneralAmt>36972</ManagementAndGeneralAmt>
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      <FeesForSrvcInvstMgmntFeesGrp>
        <TotalAmt>89770</TotalAmt>
        <ProgramServicesAmt>64814</ProgramServicesAmt>
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        <ProgramServicesAmt>4389</ProgramServicesAmt>
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      <OfficeExpensesGrp>
        <TotalAmt>73305</TotalAmt>
        <ProgramServicesAmt>52925</ProgramServicesAmt>
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        <TotalAmt>171945</TotalAmt>
        <ProgramServicesAmt>124144</ProgramServicesAmt>
        <ManagementAndGeneralAmt>47801</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>19925523</ProgramServicesAmt>
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        <Desc>RIDES DELIVERY</Desc>
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        <ProgramServicesAmt>1195419</ProgramServicesAmt>
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      <OtherExpensesGrp>
        <Desc>TALK PROGRAM</Desc>
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        <ProgramServicesAmt>19510</ProgramServicesAmt>
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      <OtherExpensesGrp>
        <Desc>CONTINUING EDUCATION</Desc>
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        <ProgramServicesAmt>18545</ProgramServicesAmt>
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      <LandBldgEquipBasisNetGrp>
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        <EOYAmt>18980084</EOYAmt>
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      <AccountsPayableAccrExpnssGrp>
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      <DeferredRevenueGrp>
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      <TotalLiabilitiesGrp>
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        <EOYAmt>8946798</EOYAmt>
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      <NoDonorRestrictionNetAssetsGrp>
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        <EOYAmt>10033286</EOYAmt>
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      <TotalNetAssetsFundBalanceGrp>
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      <TotLiabNetAssetsFundBalanceGrp>
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        <EOYAmt>18980084</EOYAmt>
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      <ReconcilationRevenueExpnssAmt>334306</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>-105989</NetUnrlzdGainsLossesInvstAmt>
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      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
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      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
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    <IRS990ScheduleA documentId="RetDoc1039100001">
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      <GiftsGrantsContrisRcvd509Grp>
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        <TotalAmt>18931</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
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        <CurrentTaxYearMinus3YearsAmt>25899807</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>26421757</CurrentTaxYearMinus2YearsAmt>
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      <Total509Grp>
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        <CurrentTaxYearMinus3YearsAmt>25899807</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>26440688</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>25035876</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>23709735</CurrentTaxYearAmt>
        <TotalAmt>126891785</TotalAmt>
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      <AmountsRcvdDsqlfyPersonGrp>
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      <SubstAndDsqlfyPrsnsTotGrp>
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      </SubstAndDsqlfyPrsnsTotGrp>
      <PublicSupportTotal509Amt>126891785</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
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        <CurrentTaxYearMinus3YearsAmt>221386</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>211690</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>289781</CurrentTaxYearMinus1YearAmt>
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      <InvestmentIncomeAndUBTIGrp>
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      <InvestmentIncomePYPct>0.00850</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>SCHEDULE A, PART III, LINE 12, EXPLANATION OF OTHER INCOME:</FormAndLineReferenceDesc>
        <ExplanationTxt>AMEX EXPRESS POINTS REDEEMED - 2023 AMOUNT: $ 21,550. 2024 AMOUNT: $ 172.</ExplanationTxt>
      </Form990ScheduleAPartVIGrp>
    </IRS990ScheduleA>
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <LandGrp>
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        <BookValueAmt>52500</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
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        <DepreciationAmt>908688</DepreciationAmt>
        <BookValueAmt>523972</BookValueAmt>
      </BuildingsGrp>
      <EquipmentGrp>
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        <DepreciationAmt>292538</DepreciationAmt>
        <BookValueAmt>94710</BookValueAmt>
      </EquipmentGrp>
      <TotalBookValueLandBuildingsAmt>671182</TotalBookValueLandBuildingsAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
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      <NetUnrealizedGainsInvstAmt>-105989</NetUnrealizedGainsInvstAmt>
      <RevenueNotReportedAmt>-105989</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>24812866</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>89770</InvestmentExpensesNotIncldAmt>
      <RevenueNotReportedFinclStmtAmt>89770</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>24902636</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>24478560</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>24478560</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>89770</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>89770</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>24568330</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>IN THE PREPARATION OF TAX RETURNS, TAX POSITIONS ARE TAKEN BASED ON INTERPRETATION OF FEDERAL, STATE AND LOCAL INCOME TAX LAWS. MANAGEMENT PERIODICALLY REVIEWS AND EVALUATES THE STATUS OF UNCERTAIN TAX POSITIONS AND MAKES ESTIMATES OF AMOUNTS, INCLUDING INTEREST AND PENALTIES, ULTIMATELY DUE OR OWED. NO AMOUNTS HAVE BEEN IDENTIFIED, OR RECORDED, AS UNCERTAIN TAX POSITIONS. FEDERAL, STATE AND LOCAL TAX RETURNS GENERALLY REMAIN OPEN FOR EXAMINATION BY THE VARIOUS TAXING AUTHORITIES FOR A PERIOD OF THREE TO FOUR YEARS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
      <WrittenEmploymentContractInd>X</WrittenEmploymentContractInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>0</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>0</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>SCOTT GARRISON</PersonNm>
        <TitleTxt>EXECUTIVE DIRECTOR</TitleTxt>
        <BaseCompensationFilingOrgAmt>154828</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>18643</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>173471</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MEMBERSHIP OF MCLS SHALL BE COMPOSED OF THOSE MICHIGAN AND INDIANA LIBRARIES THAT PROMOTE AND AID THE PURPOSES OF MCLS; AGREE TO ABIDE BY THE MCLS BYLAWS AND THE TERMS AND CONDITIONS OF MEMBERSHIP AS ESTABLISHED BY THE BOARD OF DIRECTORS; PAY THE APPROVED DUES AS ESTABLISHED BY THE BOARD OF DIRECTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>PER THE BYLAWS, EACH MEMBER SHALL BE REQUESTED TO NOTIFY THE MCLS OFFICE IN WRITING ANNUALLY OF THE PERSON WHO SHALL SERVE AS THE MEMBER'S OFFICIAL REPRESENTATIVE. THIS MEMBER REPRESENTATIVE MAY DESIGNATE IN WRITING AN ALTERNATE TO ACT IN HIS/HER STEAD. ACTING ON BEHALF OF THE MEMBER INSTITUTION, THE MEMBER REPRESENTATIVE OR ALTERNATE SHALL BE ENTITLED TO EXERCISE VOTING PRIVILEGES ON ALL MATTERS REQUIRING MEMBERSHIP APPROVAL, AND BE ELIGIBLE FOR ELECTION TO, AND VOTE FOR CANDIDATES FOR THE BOARD OF DIRECTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE 990 IS RECEIVED FROM THE ACCOUNTING FIRM, REVIEWED BY THE BUSINESS MANAGER FOR ACCURACY AND PRESENTED TO THE EXECUTIVE DIRECTOR FOR APPROVAL AND SIGNATURE. ONCE APPROVED AND SIGNED, THE RETURN IS FILED IN ACCORDANCE WITH THE INSTRUCTIONS FROM THE ACCOUNTING FIRM.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THERE WILL BE NO SELF-DEALING OR BUSINESS BY A MEMBER WITH THE ORGANIZATION. BOARD MEMBERS ARE REQUIRED TO ANNUALLY DISCLOSE THEIR INVOLVEMENTS WITH OTHER ORGANIZATIONS, VENDORS, OR ANY ASSOCIATIONS THAT MAY BE SEEN AS A CONFLICT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD NEGOTIATES A CONTRACT WITH THE EXECUTIVE DIRECTOR OUTLINING THE COMPENSATION AND BENEFITS PACKAGE. THE EXECUTIVE DIRECTOR'S REMUNERATION IS DECIDED ANNUALLY AFTER A REVIEW OF MONITORING REPORTS AND THE EXECUTIVE DIRECTOR'S SELF-EVALUATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>GOVERNING DOCUMENTS, INCLUDING THE CONFLICT OF INTEREST POLICY, ARE AVAILABLE ON THE ORGANIZATION'S WEBSITE. FINANCIAL STATEMENTS ARE AVAILABLE UPON REQUEST AND THE ANNUAL AUDIT IS FURNISHED TO DUN &amp; BRADSTREET FOR USE AND PUBLICATION ANNUALLY. FORM 990 IS MADE AVAILABLE ON GUIDESTAR'S WEBSITE. ALL DOCUMENTS ARE AVAILABLE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>