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      <GovtFurnSrvcFcltsVl170Grp>
        <TotalAmt>0</TotalAmt>
      </GovtFurnSrvcFcltsVl170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus3YearsAmt>19600</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>41800</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>306800</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>264700</CurrentTaxYearAmt>
        <TotalAmt>632900</TotalAmt>
      </TotalCalendarYear170Grp>
      <SubstantialContributorsTotAmt>0</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>632900</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
        <TotalAmt>0</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <UnrelatedBusinessNetIncm170Grp>
        <TotalAmt>0</TotalAmt>
      </UnrelatedBusinessNetIncm170Grp>
      <OtherIncome170Grp>
        <CurrentTaxYearMinus3YearsAmt>0</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>14000</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>13600</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>8600</CurrentTaxYearAmt>
        <TotalAmt>36200</TotalAmt>
      </OtherIncome170Grp>
      <TotalSupportAmt>669100</TotalSupportAmt>
      <First5Years170Ind>X</First5Years170Ind>
      <PublicSupportCY170Pct>0</PublicSupportCY170Pct>
      <PublicSupportTotal509Amt>0</PublicSupportTotal509Amt>
      <PublicSupportCY509Pct>0</PublicSupportCY509Pct>
      <InvestmentIncomeCYPct>0</InvestmentIncomeCYPct>
      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>Pt II Ln 10</FormAndLineReferenceDesc>
        <ExplanationTxt>Other Income Part II, Line 10 Description: Sale of Merchandise 2020: 0. 2021: 14000. 2022: 13600. 2023: 8600.</ExplanationTxt>
      </Form990ScheduleAPartVIGrp>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="IRS990ScheduleB-01">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleI documentId="IRS990ScheduleI-01" softwareId="23017509">
      <GrantRecordsMaintainedInd>true</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>Mass General Brigham</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>399 Revolution Dr</AddressLine1Txt>
          <CityNm>Somerville</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02145</ZIPCd>
        </USAddress>
        <RecipientEIN>043230035</RecipientEIN>
        <CashGrantAmt>230000</CashGrantAmt>
        <PurposeOfGrantTxt>Research</PurposeOfGrantTxt>
      </RecipientTable>
    </IRS990ScheduleI>
    <IRS990ScheduleO documentId="IRS990ScheduleO-01" softwareId="23017509">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>Two members of the Board were married to each other and two members of the Board were father and son.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Board has delegated authority for the review and filing of Form 990 to the president and treasurer.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Each year Board members are required to sign a form indicating that there are no conflicts of interest.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>