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        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DOROTHY KELLY GAY</PersonNm>
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        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>GILDA NOGUEIRA</PersonNm>
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        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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      <Form990PartVIISectionAGrp>
        <PersonNm>PHIL REAVIS JR</PersonNm>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>EVELYN BATTINELLI</PersonNm>
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        <OfficerInd>X</OfficerInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>BARBARA MANGUM</PersonNm>
        <TitleTxt>PRESIDENT</TitleTxt>
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        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>STEPHEN MACKEY</PersonNm>
        <TitleTxt>VICE PRESIDENT</TitleTxt>
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        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>LAWRENCE WILLWERTH III</PersonNm>
        <TitleTxt>SECRETARY</TitleTxt>
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        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>DYAN BLEWETT</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
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      <TotalReportableCompFromOrgAmt>0</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>0</TotalOtherCompensationAmt>
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      <TotalCompGreaterThan150KInd>0</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>STACK DESIGN BUILD LLC</BusinessNameLine1Txt>
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        </ContractorName>
        <ContractorAddress>
          <USAddress>
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            <StateAbbreviationCd>MA</StateAbbreviationCd>
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      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>1</CntrctRcvdGreaterThan100KCnt>
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      <AllOtherContributionsAmt>323645</AllOtherContributionsAmt>
      <TotalContributionsAmt>581510</TotalContributionsAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>86</TotalRevenueColumnAmt>
        <ExclusionAmt>86</ExclusionAmt>
      </InvestmentIncomeGrp>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>581596</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>0</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>86</ExclusionAmt>
      </TotalRevenueGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>64490</TotalAmt>
        <ProgramServicesAmt>64490</ProgramServicesAmt>
      </CompCurrentOfcrDirectorsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>5859</TotalAmt>
        <ProgramServicesAmt>5859</ProgramServicesAmt>
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      <FeesForServicesAccountingGrp>
        <TotalAmt>512</TotalAmt>
        <ManagementAndGeneralAmt>512</ManagementAndGeneralAmt>
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      <OfficeExpensesGrp>
        <TotalAmt>19308</TotalAmt>
        <ProgramServicesAmt>12394</ProgramServicesAmt>
        <ManagementAndGeneralAmt>6914</ManagementAndGeneralAmt>
      </OfficeExpensesGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>45065</TotalAmt>
        <ProgramServicesAmt>45065</ProgramServicesAmt>
      </DepreciationDepletionGrp>
      <OtherExpensesGrp>
        <Desc>UTILITIES</Desc>
        <TotalAmt>10519</TotalAmt>
        <ProgramServicesAmt>10519</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>INSURANCE</Desc>
        <TotalAmt>7600</TotalAmt>
        <ProgramServicesAmt>7600</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>REPAIRS &amp; MAINTENANCE</Desc>
        <TotalAmt>6273</TotalAmt>
        <ProgramServicesAmt>6273</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>GRANT SPECIFIC EXPENSE</Desc>
        <TotalAmt>5925</TotalAmt>
        <ProgramServicesAmt>5925</ProgramServicesAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>10959</TotalAmt>
        <ProgramServicesAmt>8324</ProgramServicesAmt>
        <FundraisingAmt>2635</FundraisingAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>176510</TotalAmt>
        <ProgramServicesAmt>166449</ProgramServicesAmt>
        <ManagementAndGeneralAmt>7426</ManagementAndGeneralAmt>
        <FundraisingAmt>2635</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>227202</BOYAmt>
        <EOYAmt>134622</EOYAmt>
      </CashNonInterestBearingGrp>
      <InventoriesForSaleOrUseGrp>
        <BOYAmt>1800</BOYAmt>
        <EOYAmt>1800</EOYAmt>
      </InventoriesForSaleOrUseGrp>
      <LandBldgEquipCostOrOtherBssAmt>3573681</LandBldgEquipCostOrOtherBssAmt>
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      <LandBldgEquipBasisNetGrp>
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        <BOYAmt>100000</BOYAmt>
        <EOYAmt>100000</EOYAmt>
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      <TotalAssetsGrp>
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      <AccountsPayableAccrExpnssGrp>
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      <TotalLiabilitiesGrp>
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      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
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      </NoDonorRestrictionNetAssetsGrp>
      <DonorRestrictionNetAssetsGrp>
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        <EOYAmt>1589612</EOYAmt>
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        <EOYAmt>3765038</EOYAmt>
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      <ReconcilationRevenueExpnssAmt>405086</ReconcilationRevenueExpnssAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <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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      <GiftsGrantsContriRcvd170Grp>
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        <CurrentTaxYearMinus3YearsAmt>147335</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>623156</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1474006</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>541806</CurrentTaxYearAmt>
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      </GiftsGrantsContriRcvd170Grp>
      <TotalCalendarYear170Grp>
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        <CurrentTaxYearMinus3YearsAmt>147335</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>623156</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1474006</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>541806</CurrentTaxYearAmt>
        <TotalAmt>2827160</TotalAmt>
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      <PublicSupportTotal170Amt>2827160</PublicSupportTotal170Amt>
      <TotalSupportAmt>2827160</TotalSupportAmt>
      <PublicSupportCY170Pct>1.00000</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>1.00000</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
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    <IRS990ScheduleD documentId="RetDoc1039900001">
      <ArtPublicExhibitionAmountsGrp>
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      </ArtPublicExhibitionAmountsGrp>
      <CollectionUsedPubExhibitionInd>X</CollectionUsedPubExhibitionInd>
      <CollUsedScholarlyRsrchInd>X</CollUsedScholarlyRsrchInd>
      <CollectionUsedPreservationInd>X</CollectionUsedPreservationInd>
      <SolicitedAssetsSaleInd>0</SolicitedAssetsSaleInd>
      <CYEndwmtFundGrp>
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        <EndYearBalanceAmt>54077</EndYearBalanceAmt>
      </CYEndwmtFundGrp>
      <CYMinus1YrEndwmtFundGrp>
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        <EndYearBalanceAmt>54077</EndYearBalanceAmt>
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      <CYMinus2YrEndwmtFundGrp>
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        <ContributionsAmt>18806</ContributionsAmt>
        <EndYearBalanceAmt>54077</EndYearBalanceAmt>
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        <EndYearBalanceAmt>35271</EndYearBalanceAmt>
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        <ContributionsAmt>6876</ContributionsAmt>
        <EndYearBalanceAmt>16508</EndYearBalanceAmt>
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      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
      <LandGrp>
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        <BookValueAmt>654900</BookValueAmt>
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      <BuildingsGrp>
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        <BookValueAmt>2873716</BookValueAmt>
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        <Desc>EASTERN - 8525 CREDIT CARD (ELAN FINANCIALS)</Desc>
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      </OtherLiabilitiesOrgGrp>
      <OtherLiabilitiesOrgGrp>
        <Desc>SQUARE SALES TAX PAYABLE</Desc>
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      <RevenueNotReportedAmt>0</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>581596</RevenueSubtotalAmt>
      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
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      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>176510</ExpensesSubtotalAmt>
      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III, LINE 1A:</FormAndLineReferenceDesc>
        <ExplanationTxt>HISTORICAL WORKS OF ART, ARTIFACTS, AND DOCUMENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>HISTORICAL WORKS OF ART, ARTIFACTS, AND DOCUMENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
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    <IRS990ScheduleJ documentId="RetDoc1042400001">
      <PersonalServicesInd>X</PersonalServicesInd>
      <WrittenPolicyRefTAndEExpnssInd>0</WrittenPolicyRefTAndEExpnssInd>
      <SubstantiationRequiredInd>0</SubstantiationRequiredInd>
      <WrittenEmploymentContractInd>X</WrittenEmploymentContractInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <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>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>BARBARA MANGUM RECEIVED $2,000 FOR WRITING GRANTS AS PART OF HER ART CONSERVATION BUSINESS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleL documentId="RetDoc1042800001">
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <PersonNm>BARBARA MANGUM</PersonNm>
        </NameOfInterested>
        <RelationshipDescriptionTxt>EXECUTIVE DIRECTOR</RelationshipDescriptionTxt>
        <TransactionAmt>2000</TransactionAmt>
        <TransactionDesc>RECEIVED COMPENSATION FOR WRITING GRANTS AS PART OF HER ART CONSERVATION BUSINESS.</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleM documentId="RetDoc1042900001">
      <WorksOfArtGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>1</ContributionCnt>
        <NoncashContributionsRptF990Amt>350</NoncashContributionsRptF990Amt>
      </WorksOfArtGrp>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>0</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
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    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>EVELYN BATTINELLI, EXECUTIVE DIRECTOR, SECRETARY &amp; TRUSTEE IS TRUSTEE REGINA PISA'S AUNT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION HAD MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOMERVILLE HISTORICAL SOCIETY IS A MEMBERSHIP ORGANIZATION GOVERNED BY A BOARD OF TUSTEES. THE BOARD OF TRUSTEES IS ELECTED ANNUALLY BY A QUORUM OF THE MEMBERS AT THE ANNUAL MEETING. MEMBERS ARE THOSE INDIVIDUALS WHO PAY ANNUAL DUES</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 8B</FormAndLineReferenceDesc>
        <ExplanationTxt>MONTHLY BOARD MEETINGS MINUTES WERE WRITTEN UP TO DOCUMENT THE ACTIONS UNDERTAKEN DURING THE YEAR</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>YES THE GOVERNING BODY REVIEWED FORM 990 BEFORE BEING FILED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD MONITORED THE ORGANIZATIONS WRITTEN POLICIES AND MADE SURE THEY WERE FOLLOWED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PROCESS FOR DETERMINING COMPENSATION FOR ALISON DRASNER INCLUDED REVIEW BY INDEPENDENT PEOPLE. REVIEW OF HER ABILITIES AND A DECISION BY THE BOARD MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
