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      <Form990PartVIISectionAGrp>
        <PersonNm>DOUGLAS BOLES</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DUNCAN DAYTON</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>FRED J NATION</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>LARRY FOYT</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MELISSA CAITO</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>ROBERT DYSON</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>0.5</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>ROBERT RAHAL</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>SCOTT BORCHETTA</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>John Joseph Hale</PersonNm>
        <TitleTxt>President (ENDED JUNE 2025)</TitleTxt>
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      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>PHIL FOSTER</PersonNm>
        <TitleTxt>DIRECTOR OF FINANCE</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0.0</AverageHoursPerWeekRltdOrgRt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DANIEL C ROSENAU</PersonNm>
        <TitleTxt>RESTORATION SERVICES MANAGER</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>JASON VANSICKLE</PersonNm>
        <TitleTxt>VP OF CURATION AND EDUCATION</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>KARA KOVERT PRAY</PersonNm>
        <TitleTxt>VP OF ADVANCEMENT</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MANDI BENDER</PersonNm>
        <TitleTxt>VP OF OPERATIONS</TitleTxt>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>SHIEL SEXTON COMPANY INC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>902 N CAPITAL AVENUE</AddressLine1Txt>
            <CityNm>INDIANAPOLIS</CityNm>
            <StateAbbreviationCd>IN</StateAbbreviationCd>
            <ZIPCd>46204</ZIPCd>
          </USAddress>
        </ContractorAddress>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>RM AUCTIONS INC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1711 THUNDERBIRD STREET</AddressLine1Txt>
            <CityNm>TROY</CityNm>
            <StateAbbreviationCd>MI</StateAbbreviationCd>
            <ZIPCd>48084</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>AUCTION SERVICES</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>EXHIBIT CONCEPTS INC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>700 CROSSROADS COURT</AddressLine1Txt>
            <CityNm>VANDALLIA</CityNm>
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            <ZIPCd>453779675</ZIPCd>
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        </ContractorAddress>
        <ServicesDesc>EXHIBIT CONSTRUCTIONS</ServicesDesc>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>INDIANAPOLIS MOTOR SPEEDWAY LLC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>4790 WEST 16TH STREET</AddressLine1Txt>
            <CityNm>INDIANAPOLIS</CityNm>
            <StateAbbreviationCd>IN</StateAbbreviationCd>
            <ZIPCd>46222</ZIPCd>
          </USAddress>
        </ContractorAddress>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>BORSHOFF</BusinessNameLine1Txt>
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        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>342 MASSACHUSETTS AVE</AddressLine1Txt>
            <CityNm>Indianapolis</CityNm>
            <StateAbbreviationCd>IN</StateAbbreviationCd>
            <ZIPCd>46204</ZIPCd>
          </USAddress>
        </ContractorAddress>
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        <CompensationAmt>227000</CompensationAmt>
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      <CntrctRcvdGreaterThan100KCnt>14</CntrctRcvdGreaterThan100KCnt>
      <MembershipDuesAmt>300027</MembershipDuesAmt>
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      <NoncashContributionsAmt>137212</NoncashContributionsAmt>
      <TotalContributionsAmt>11603714</TotalContributionsAmt>
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        <BusinessCd>711210</BusinessCd>
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      <ProgramServiceRevenueGrp>
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        <BusinessCd>711210</BusinessCd>
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        <RelatedOrExemptFuncIncomeAmt>3668648</RelatedOrExemptFuncIncomeAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>REIMBURSED SERVICES</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>46838</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>46838</RelatedOrExemptFuncIncomeAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>RENTAL</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>690467</TotalRevenueColumnAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>OTHER INCOME</Desc>
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        <PersonalAmt>0</PersonalAmt>
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      <OtherExpensesGrp>
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        <ProgramServicesAmt>795112</ProgramServicesAmt>
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      <OtherExpensesGrp>
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        <ProgramServicesAmt>8204892</ProgramServicesAmt>
        <ManagementAndGeneralAmt>3171103</ManagementAndGeneralAmt>
        <FundraisingAmt>517709</FundraisingAmt>
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        <EOYAmt>11872544</EOYAmt>
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      <AccountsReceivableGrp>
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        <EOYAmt>266923</EOYAmt>
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        <EOYAmt>0</EOYAmt>
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        <EOYAmt>574728</EOYAmt>
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        <EOYAmt>60117053</EOYAmt>
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        <EOYAmt>93662327</EOYAmt>
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        <ExplanationTxt>DESCRIPTION OF THE ORGANIZATION'S COLLECTIONS: FOOTNOTE TO THE FINANCIAL STATEMENTS: COLLECTIONS OF WORKS OF ART, HISTORICAL TREASURES AND SIMILAR ASSETS ARE NOT CAPITALIZED IN AS MUCH AS THE ITEMS ARE PRESERVED AND CARED FOR CONTINUOUSLY. MUSEUM COLLECTIONS CONSIST PRIMARILY OF ANTIQUE AUTOMOBILES, RACE CARS, DONATED PACE CARS AND OTHER RACING MEMORABILIA. THE FOUNDATION REFLECTS THE FAIR VALUE OF DONATED COLLECTION ITEMS IN THE STATEMENTS OF ACTIVITIES. PURCHASES OF COLLECTION ITEMS ARE REPORTED IN THE YEAR OF ACQUISITION AS DECREASES IN UNRESTRICTED NET ASSETS, OR IN TEMPORARILY OR PERMANENTLY RESTRICTED NET ASSETS IF THE ASSETS USED TO PURCHASE THE ITEMS WERE RESTRICTED TO THAT USE BY DONOR STIPULATION. PROCEEDS FROM DISPOSAL OF AND INSURANCE RECOVERIES RELATED TO COLLECTION ITEMS ARE REPORTED AS INCREASES IN THE APPROPRIATE NET ASSET CLASSES AND ARE USED FOR THE ACQUISITION OF OTHER COLLECTION ITEMS AND THE DIRECT CARE OF COLLECTION OBJECTS. MUSEUM COLLECTIONS ARE EXPENSED WHENPURCHASED OR DONATED.</ExplanationTxt>
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        <PersonNm>John Joseph Hale</PersonNm>
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        <PersonNm>PHIL FOSTER</PersonNm>
        <TitleTxt>DIRECTOR OF FINANCE</TitleTxt>
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        <PersonNm>KARA KOVERT PRAY</PersonNm>
        <TitleTxt>VP OF ADVANCEMENT</TitleTxt>
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        <PersonNm>JASON VANSICKLE</PersonNm>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 7 Non-fixed payments</FormAndLineReferenceDesc>
        <ExplanationTxt>PROCESS FOR DETERMINING OFFICER COMPENSATION: In addition to the base salary, the President is eligible for an annual bonus based on the attainment of specific objectives determined annually by the Board. A bonus for the President and key employees was approved by the Board in June 2025 to recognize the successful renovation and reopening of the museum.</ExplanationTxt>
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          <BusinessName>
            <BusinessNameLine1Txt>Indianapolis Motor Speedway LLC</BusinessNameLine1Txt>
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        <RelationshipDescriptionTxt>Officer is a Board Member</RelationshipDescriptionTxt>
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        <TransactionDesc>Shared Services Agreement</TransactionDesc>
        <SharingOfRevenuesInd>false</SharingOfRevenuesInd>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule L, Part IV BUSINESS TRANSACTIONS INVOLVING INTERESTED PERSONS</FormAndLineReferenceDesc>
        <ExplanationTxt>The Foundation has entered into a shared services agreement (agreement) with the Indianapolis Motor Speedway (IMS). The agreement describes the terms between IMS and the Foundation with respect to providing certain services relating to Mail Services, External Security, Marketing, and some Creative Services. IMS owns the building and provides the Foundation's facility with lease terms without charge.</ExplanationTxt>
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        <NoncashContributionsRptF990Amt>82412</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>Market value</MethodOfDeterminingRevenuesTxt>
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      <CollectiblesGrp>
        <ContributionCnt>2</ContributionCnt>
        <NoncashContributionsRptF990Amt>54800</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>Market value</MethodOfDeterminingRevenuesTxt>
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      <ReviewProcessUnusualNCGiftsInd>true</ReviewProcessUnusualNCGiftsInd>
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        <FormAndLineReferenceDesc>Schedule M, Part I, Line 33 AMOUNTS REPORTED IN COLUMN (C)</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FOUNDATION RECEIVED SEVERAL COLLECTIBLE ITEMS DURING THE YEAR. PER SFAS 116, THE FOUNDATION DOES NOT RECORD THESE ITEMS AS REVENUE ON THE FINANCIAL STATEMENTS. THEREFORE THESE ITEMS ARE NOT CAPITALIZED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule M, Part I, Line 11 AMOUNTS REPORTED IN COLUMN (C)</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PUBLICLY TRADED STOCKS ON SCHEDULE M WERE ALL RECEIVED TO SATISFY A PRIOR YEAR PLEDGE AND ARE NOT INCLUDED IN CURRENT YEAR INCOME.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule M, Part I Explanations of reporting method for number of contributions</FormAndLineReferenceDesc>
        <ExplanationTxt>Collectibles - NUMBER OF CONTRIBUTIONS Securities - Publicly traded - THE ORGANIZATION IS REPORTING THE NUMBER OF STOCKS DONATED.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part III, Line 2 New program services</FormAndLineReferenceDesc>
        <ExplanationTxt>Significant changes in program services: The museum re-opened in April 2025, after being closed since November 2023 for substantial infrastructure and technology renovations.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 1a</FormAndLineReferenceDesc>
        <ExplanationTxt>Kirk Hendrix was a board member from January to June. In July he became the interim President and therefore a non-voting board member</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 11b Review of form 990 by governing body</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD ENGAGES A FIRM TO PERFORM AN INDEPENDENT AUDIT OF THE ORGANIZATIONS FINANCIAL STATEMENTS. THE FORM 990 IS PREPARED BY AN INDEPENDENT ACCOUNTING FIRM AFTER AUDIT IS COMPLETE AND REVIEWED BY THE FINANCE COMMITTEE. THE RESULTS ARE FORMALLY PRESENTED TO THE BOARD ALONG WITH MANAGEMENT REMARKS. THE BOARD TREASURER SIGNS THE RETURN PRIOR TO FILING.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 12c Conflict of interest policy</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION HAS ADOPTED A CONFLICT-OF-INTEREST POLICY THAT REQUIRES DIRECTORS TO SUBMIT AN ANNUAL CONFLICT OF INTEREST DISCLOSURE. THE ANNUAL DISCLOSURE REQUIRES DIRECTORS, TO DISCLOSE, IN WRITING, ANY KNOWN FINANCIAL INTEREST THE INDIVIDUAL HAS IN ANY BUSINESS ENTITY THAT TRANSACTS BUSINESS WITH THE ORGANIZATION. IN ADDITION, DIRECTORS ARE REQUIRED TO IMMEDIATELY DISCLOSE ANY POSSIBLE CONFLICTS OF INTEREST THAT ARISE MID-YEAR IN RELATION TO A PROPOSED TRANSACTION. THE CONFLICT-OF-INTEREST POLICY REQUIRES ANY INDIVIDUAL WITH A CONFLICT BE RECUSED FROM THE DECISION-MAKING PROCESS, INDEPENDENT DIRECTORS OR COMMITTEE MEMBERS DETERMINE THE PROPOSED TRANSACTION IS IN THE BEST INTEREST OF THE ORGANIZATION, AND THE TRANSACTION MUST BE APPROVED BY A VOTE OF THE INDEPENDENT DIRECTORS OR COMMITTEE MEMBERS WITHOUT THE PARTICIPATION OF ANY INTERESTED INDIVIDUAL.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 15a Process to establish compensation of top management official</FormAndLineReferenceDesc>
        <ExplanationTxt>THE GOVERNANCE COMMITTEE REVIEWS AND RECOMMENDS, AND THE BOARD APPROVES THE COMPENSATION FOR THE PRESIDENT. THE SALARY IS BASED ON PAY FOR A COMPARABLE POSITION.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 15b Process to establish compensation of other employees</FormAndLineReferenceDesc>
        <ExplanationTxt>THE GOVERNANCE COMMITTEE REVIEWS AND RECOMMENDS, AND THE BOARD APPROVES THE COMPENSATION FOR OFFICERS. THE SALARY IS BASED ON PAY FOR A COMPARABLE POSITION.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Line 19 Required documents available to the public</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S GOVERNING DOCUMENTS, CONLFICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS ARE AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VIII, Line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>In planning for the museum renovation, a review of the entire vehicle collection was performed. It was determined that certain vehicles did not fit the mission of the museum. These vehicles went through a deaccession process and were sold in February 2025. The proceeds are being used to establish an endowment. The earnings of the endowment will be used to provide funding for the direct care of the collection and acquisition of collection items that better fit the mission of the museum.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XI, Line 9 Other changes in net assets or fund balances</FormAndLineReferenceDesc>
        <ExplanationTxt>Collection Items Acquired and Not Capitalized - -13000000; Loss on Uncollectible Contributions - 353000; Proceeds from Deaccession - XXX-XX-XXXX; Total - 101004076;</ExplanationTxt>
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