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        <RegionTxt>MIDDLE EAST AND NORTH AFRICA</RegionTxt>
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      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>NORTH AMERICA</RegionTxt>
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        <SpecificServicesProvidedTxt>EDITORIAL SERVICES</SpecificServicesProvidedTxt>
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      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>NORTH AMERICA</RegionTxt>
        <TypeOfActivitiesConductedTxt>PROGRAM SERVICES</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>CONSULTING SERVICES</SpecificServicesProvidedTxt>
        <RegionTotalExpendituresAmt>15463</RegionTotalExpendituresAmt>
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      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>NORTH AMERICA</RegionTxt>
        <TypeOfActivitiesConductedTxt>PROGRAM SERVICES</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>LEGAL SERVICES</SpecificServicesProvidedTxt>
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      <ContinuationTotalEmployeeCnt>0</ContinuationTotalEmployeeCnt>
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      <ContinuationSpentAmt>0</ContinuationSpentAmt>
      <TotalSpentAmt>51299</TotalSpentAmt>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>POSTER SESSION AWARDS - PROVIDES AN OPPORTUNITY FOR SENIOR CARDIOTHORACIC SURGERY RESIDENTS AND/OR CONGENTIAL HEART SURGERY FELLOWS TO REPRESENT THEIR INSTITUTION BY PRESENTING A SCIENTIFIC POSTED OF THEIR CLINICAL/INVESTIGATIVE RESEARC AT THE AATS ANNUAL MEETING.</TypeOfAssistanceTxt>
        <RegionTxt>EAST ASIA AND THE PACIFIC</RegionTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>358</CashGrantAmt>
        <MannerOfCashDisbursementTxt>CHECK</MannerOfCashDisbursementTxt>
        <ValuationMethodUsedDesc>BOOK</ValuationMethodUsedDesc>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>POSTER SESSION AWARDS - PROVIDES AN OPPORTUNITY FOR SENIOR CARDIOTHORACIC SURGERY RESIDENTS AND/OR CONGENTIAL HEART SURGERY FELLOWS TO REPRESENT THEIR INSTITUTION BY PRESENTING A SCIENTIFIC POSTED OF THEIR CLINICAL/INVESTIGATIVE RESEARC AT THE AATS ANNUAL MEETING.</TypeOfAssistanceTxt>
        <RegionTxt>EUROPE (INCLUDING ICELAND &amp; GREENLAND)</RegionTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>1500</CashGrantAmt>
        <MannerOfCashDisbursementTxt>CHECK</MannerOfCashDisbursementTxt>
        <ValuationMethodUsedDesc>BOOK</ValuationMethodUsedDesc>
      </ForeignIndividualsGrantsGrp>
      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>POSTER SESSION AWARDS - PROVIDES AN OPPORTUNITY FOR SENIOR CARDIOTHORACIC SURGERY RESIDENTS AND/OR CONGENTIAL HEART SURGERY FELLOWS TO REPRESENT THEIR INSTITUTION BY PRESENTING A SCIENTIFIC POSTED OF THEIR CLINICAL/INVESTIGATIVE RESEARC AT THE AATS ANNUAL MEETING.</TypeOfAssistanceTxt>
        <RegionTxt>NORTH AMERICA</RegionTxt>
        <RecipientCnt>3</RecipientCnt>
        <CashGrantAmt>3857</CashGrantAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ASSOCIATION MONITORS THE USE OF GRANT FUNDS BY REQUIRING A SUMMARY REPORT AND EVALUATION OF THE RECIPIENT'S EXPERIENCE.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III ACCOUNTING METHOD:</FormAndLineReferenceDesc>
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          <ZIPCd>01915</ZIPCd>
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        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>445832</CashGrantAmt>
        <NonCashAssistanceAmt>143219</NonCashAssistanceAmt>
        <ValuationMethodUsedDesc>COST</ValuationMethodUsedDesc>
        <NonCashAssistanceDesc>VALUE OF IN-KIND SERVICES AND FACILITIES</NonCashAssistanceDesc>
        <PurposeOfGrantTxt>GENERAL SUPPORT AND GRANT SUPPORT FOR RESEARCH AND FELLOWSHIP GRANTS.</PurposeOfGrantTxt>
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      <Total501c3OrgCnt>1</Total501c3OrgCnt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ASSOCIATION MONITORS THE USE OF GRANT FUNDS FOR THE RECIPIENT ORGANIZATION NOTED IN PART II BY REVIEWING SCIENTIFIC MATERIALS SUBMITTED FOR ALL RESEARCH AWARD PROGRAMS AND RECOMMENDING CANDIDATES FOR THE RESEARCH AWARDS. THE NON-CASH ASSISTANCE REPRESENTS VALUE OF IN-KIND SERVICES AND FACILITIES PROVIDED TO THE RECIPIENT ORGANIZATION. THE ASSOCIATION MONITORS THE USE OF GRANT FUNDS FOR THE INDIVIDUALS NOTED IN PART III REQUIRING A COPY OF THEIR REGISTRATION TO THE PROGRAM BEFORE THEY ARE PROVIDED THE FUNDS AND/OR A SUMMARY REPORT AND EVALUATION OF THEIR EXPERIENCE.</ExplanationTxt>
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      <Form990OfOtherOrganizationsInd>X</Form990OfOtherOrganizationsInd>
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      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
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        <PersonNm>DAVID BOBBITT</PersonNm>
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        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
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        <TotalCompensationFilingOrgAmt>435245</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>SPENCER MCGRATH</PersonNm>
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        <DeferredCompensationFlngOrgAmt>10489</DeferredCompensationFlngOrgAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MELISSA BINETTE</PersonNm>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>226935</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>226935</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>CARA GENSEL-HRUBES</PersonNm>
        <TitleTxt>DIRECTOR OF IT</TitleTxt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>195043</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ADAM SILVA</PersonNm>
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        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>164034</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>164034</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KATHRYN FEDERICO</PersonNm>
        <TitleTxt>DIRECTOR, AATS FOUNDATION</TitleTxt>
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        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
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        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ANDREA MANCINELLI</PersonNm>
        <TitleTxt>CHIEF FINANCIAL OFFICER</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>20560</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>157827</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>THE EXECUTIVE COMMITTEE MEETS ANNUALLY TO DETERMINE THE COMPENSATION OF THE CHIEF EXECUTIVE OFFICER BASED UPON A REVIEW OF PERFORMANCE COMPARED TO OBJECTIVES ESTABLISHED AT THE BEGINNING OF THE YEAR BY THE EXECUTIVE COMMITTEE, BOARD, AND THE CHIEF EXECUTIVE OFFICER. FOLLOWING THE EXECUTIVE COMMITTEE'S RECOMMENDATION, THE FULL BOARD VOTES TO APPROVE THE RECOMMENDED COMPENSATION.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>PER THE BY-LAWS, THE EXECUTIVE COMMITTEE HAS THE AUTHORITY TO ACT ON BEHALF OF THE BOARD. NO OTHER COMMITTEES HAVE SUCH AUTHORITY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>ACTIVE AND SENIOR MEMBERS HAVE VOTING PRIVILEGES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>ACTIVE AND SENIOR MEMBERS HAVE THE RIGHT TO VOTE ON THE ELECTION OF OFFICERS TO THE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>ACTIVE AND SENIOR MEMBERS HAVE THE RIGHT TO APPROVE AMENDMENTS TO THE BY-LAWS, COMMITTEE APPOINTMENTS, ACTIONS OF THE BOARD, AND NEW MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 IS REVIEWED BY THE CHIEF FINANCIAL OFFICER AND IS THEN PROVIDED TO THE CHIEF EXECUTIVE OFFICER, THE TREASURER, FINANCE COMMITTEE AND EXECUTIVE COMMITTEE FOR FINAL REVIEW BEFORE IT IS FILED. ADDITIONALLY, FORM 990 WILL BE PROVIDED TO THE BOARD VIA E-MAIL PRIOR TO FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ANNUALLY, ALL MEMBERS OF THE BOARD OF DIRECTORS ARE REQUESTED TO COMPLETE A CONFLICT OF INTEREST DISCLOSURE FORM, WHICH IS KEPT ON FILE AND REVIEWED BY THE BOARD IF ANY CONFLICT IS INDICATED. THE CONFLICT OF INTEREST POLICY IS MONITORED THROUGH BOARD MEETINGS WHERE ALL MEMBERS REVIEW POLICIES. THE BOARD CHAIR AND CEO MONITOR THESE TASKS. IF A CONFLICT ARISES DURING THE YEAR, THE BOARD MEMBER SHALL IMMEDIATELY NOTIFY THE CHAIR OF THE BOARD, WHO WILL DETERMINE APPROPRIATE RESOLUTION. THE BOARD OF DIRECTORS SHALL BE RESPONSIBLE FOR MAKING ALL DECISIONS CONCERNING RESOLUTIONS OF CONFLICTS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>AATS HAS A FORMALIZED COMPENSATION SYSTEM THAT IS DETAILED IN THE AATS COMPENSATION ADMINISTRATION MANUAL. THE MANUAL PROVIDES THE STEPS TAKEN IN DETERMINING COMPENSATION RANGE FOR EVERY LEVEL OF TEAM MEMBER TO INCLUDE THE CEO. THE COMPENSATION RANGE DATA IS PROVIDED BY A THIRD-PARTY ORGANIZATION. STAFF SALARY RANGES WILL BE EVALUATED AND REVIEWED BIENNIALLY AND WILL BE ADJUSTED AS NECESSARY. SPOT EVALUATIONS WILL BE CONDUCTED ANNUALLY FOR CERTAIN POSITIONS AS REQUIRED. POSITIONS ARE COMPARED TO THE PAY PRACTICES OF OTHER COMPARABLE TRADE/PROFESSIONAL ASSOCIATIONS BASED ON ASSOCIATION REVENUE, STAFF SIZE, LOCATION OF EMPLOYEE AND OTHER POTENTIAL FACTORS. THE AATS'S COMPENSATION PHILOSOPHY IS MONITORED BY THE CEO AND THE AATS BOARD OF DIRECTORS WITH ASSISTANCE FROM THE ASSOCIATION'S HUMAN RESOURCES REPRESENTATIVE. IN 2021, AATS HIRED AN OUTSIDE HUMAN RESOURCES CONSULTANT WHO PREPARED AND UPDATED COMPENSATION REVIEW BASED ON INDUSTRY REPORTING AND BENCHMARKS OF SIMILAR ORGANIZATIONS. COMPENSATION LEVELS WERE IN LINE WITH FINDINGS AND NO CHANGES WERE MADE. THE EXECUTIVE COMMITTEE MEETS ANNUALLY TO DETERMINE THE COMPENSATION OF THE CHIEF EXECUTIVE OFFICER BASED UPON A REVIEW OF PERFORMANCE COMPARED TO OBJECTIVES ESTABLISHED AT THE BEGINNING OF THE YEAR BY THE EXECUTIVE COMMITTEE, BOARD, AND THE CHIEF EXECUTIVE OFFICER. FOLLOWING THE EXECUTIVE COMMITTEE'S RECOMMENDATION, THE FULL BOARD VOTES TO APPROVE THE RECOMMENDED COMPENSATION. THE PROCESS DESCRIBED HERE WAS LAST COMPLETED IN 2021.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS ARE AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>CONTRACTED SERVICES 706,800. DECORATOR &amp; DESIGN CONSULTANT 431,257. OTHER PROFESSIONAL FEES 99,601. EXHIBIT MANAGEMENT 97,058. CONSULTANTS 16,967.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PROCESS FOR OVERSIGHT OF THE AUDIT AND SELECTION OF AN INDEPENDENT ACCOUNTANT HAS NOT CHANGED SINCE THE PRIOR YEAR.</ExplanationTxt>
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      <AssetPurchaseFromOtherOrgInd>0</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>0</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>0</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>0</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>0</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>0</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>1</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>1</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>0</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>0</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>AATS FOUNDATION</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>B</TransactionTypeTxt>
        <InvolvedAmt>445832</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>CASH</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>AATS FOUNDATION</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>O</TransactionTypeTxt>
        <InvolvedAmt>101813</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>FAIR MARKET VALUE</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>AATS FOUNDATION</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>N</TransactionTypeTxt>
        <InvolvedAmt>41406</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>FAIR MARKET VALUE</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
    </IRS990ScheduleR>
  </ReturnData>
</Return>
