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          <BusinessNameLine1Txt>NEW YORK AND PRESBYTERIAN HOSPITAL</BusinessNameLine1Txt>
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        <OtherSupportAmt>67052</OtherSupportAmt>
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      <SupportedOrgInformationGrp>
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          <BusinessNameLine1Txt>NORTHERN WESTCHESTER HOSPITAL</BusinessNameLine1Txt>
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        <OrganizationTypeCd>3</OrganizationTypeCd>
        <GoverningDocumentListedInd>1</GoverningDocumentListedInd>
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        <OtherSupportAmt>99938</OtherSupportAmt>
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          <BusinessNameLine1Txt>PHELPS MEMORIAL HOSPITAL ASSOC</BusinessNameLine1Txt>
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        <EIN>131725076</EIN>
        <OrganizationTypeCd>3</OrganizationTypeCd>
        <GoverningDocumentListedInd>1</GoverningDocumentListedInd>
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      <SupportSumAmt>0</SupportSumAmt>
      <OtherSupportSumAmt>303461</OtherSupportSumAmt>
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        <SupportedOrgVoiceInvestmentInd>1</SupportedOrgVoiceInvestmentInd>
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        <ActivitiesTestInd>X</ActivitiesTestInd>
        <ActivitiesFurtherExemptPrpsInd>1</ActivitiesFurtherExemptPrpsInd>
        <ActivitiesEngagedOrgInvlmntInd>1</ActivitiesEngagedOrgInvlmntInd>
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      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>SCHEDULE A, SECTION D, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CHIEF EXECUTIVE OFFICER ("CEO"), ACTING CEO, OR OTHER SENIOR MOST ADMINISTRATIVE EXECUTIVE OF EACH HOSPITAL (SUPPORTED ORGANIZATIONS) SHALL SERVE ON THE BOARD OF DIRECTORS. PER THE BYLAWS OF THE ORGANIZATION, THE CHIEF EXECUTIVE OFFICERS ("CEOS") OF THE SUPPORTED ORGANIZATIONS LISTED IN PART I, LINE 11G, SHALL MAINTAIN AN ACTIVE ROLE IN THE AFFAIRS OF THE CORPORATION AND THE PRESIDENT/CEO OF THE ORGANIZATION SHALL SEEK THE ADVICE AND COUNSEL OF THE CEOS OF LAWRENCE HOSPITAL CENTER, NORTHERN WESTCHESTER HOSPITAL ASSOCIATION, PHELPS MEMORIAL HOSPITAL ASSOCIATION, AND WHITE PLAINS HOSPITAL MEDICAL CENTER (EACH INDIVIDUALLY, A "HOSPITAL AND COLLECTIVELY, THE "HOSPITALS") IN ORDER TO ASSESS THE DEGREE TO WHICH THE CORPORATION IS MEETING THE NEEDS OF THE HOSPITALS. THE CEOS OF THE HOSPITALS SHALL MAKE RECOMMENDATIONS TO THE PRESIDENT/CEO OF THE ORGANIZATION AND TO THE BOARD OF DIRECTORS AS TO HOW THESE NEEDS CAN BEST BE MET.</ExplanationTxt>
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      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>PART I, LINE 12G, COLUMN (IV):</FormAndLineReferenceDesc>
        <ExplanationTxt>HEALTHSTAR NETWORK INC. PROVIDES THE FOLLOWING SERVICES TO EACH OF ITS SUPPORTED ORGANIZATIONS: 1. PROVIDE ACCESS TO AND COORDINATE THE MEDICAL MALPRACTICE INSURANCE PROGRAM. 2. WESTCHESTER EMERGENCY MEDICAL SERVICES, INCLUDING AMBULANCE TRANSPORTS, EMERGENCY PREPAREDNESS, FLY CAR SYSTEM, CALL CENTER AND EMERGENCY MEDICAL TECHNICIAN LEASING. 3. FACILITATING THE PROCESS OF WORKERS COMPENSATION CLAIMS</ExplanationTxt>
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      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>SCHEDULE A, SECTION D, LINE 3:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CEO OF EACH SUPPORTED ORGANIZATION SERVES ON THE BOARD OF HEALTHSTAR NETWORK INC. AS BOARD MEMBERS OF THE ORGANIZATION THEY HAVE THE POWER TO CREATE THE ORGANIZATION'S INVESTMENT POLICIES AS WELL AS DIRECT THE USE OF THE ORGANIZATION'S INCOME AND ASSETS AT ANY POINT DURING THE YEAR.</ExplanationTxt>
      </Form990ScheduleAPartVIGrp>
      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>SCHEDULE A, SECTION E, LINE 2A:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SUPPORTED ORGANIZATIONS' MISSIONS IS TO PROVIDE QUALITY, PATIENT CENTERED CARE THROUGH A UNIQUE COMBINATION OF MEDICAL EXPERTISE, LEADING-EDGE TECHNOLOGY, AND A COMMITMENT TO HUMANITY. HEALTHSTAR NETWORK INC. WORKS TO HELP THE SUPPORTED ORGANIZATIONS ACHIEVE THEIR MISSIONS BY PROVIDING NETWORK LEVEL SERVICES SUCH AS JOINT INSURANCE PROGRAMS AND AMBULANCE SERVICES TO THE SUPPORTED ORGANIZATIONS.</ExplanationTxt>
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      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>SCHEDULE A, SECTION E, LINE 2B:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S ACTIVITIES WOULD HAVE BEEN PERFORMED BY THE SUPPORTED ORGANIZATIONS HAD THE ORGANIZATION NOT HAD PERFORMED THEM. THE SUPPORTED ORGANIZATIONS NEED THE SERVICES PROVIDED BY THE ORGANIZATION IN ORDER TO OPERATE THE HOSPITAL AND TO PROVIDE OPTIMAL SERVICE TO THEIR PATIENTS.</ExplanationTxt>
      </Form990ScheduleAPartVIGrp>
      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>SCHEDULE A, LINE 1:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S ARTICLES OF INCORPORATION STATE THAT WHITE PLAINS HOSPITAL MEDICAL CENTER, NORTHERN WESTCHESTER HOSPITAL, AND PHELPS MEMORIAL HOSPITAL ASSOC. ARE ALL SUPPORTED ORGANIZATIONS OF THE ORGANIZATION. IN 2019, THE ORGANIZATION REPLACED LAWRENCE HOSPITAL WITH NEW YORK AND PRESBYTERIAN HOSPITAL AS ITS LAST SUPPORTING ORGANIZATION AS LAWRENCE HOSPITAL MERGED INTO NEW YORK AND PRESBYTERIAN HOSPITAL. NEW YORK AND PRESBYTERIAN HOSPITAL WAS THE PARENT ENTITY OF LAWRENCE HOSPITAL, WHICH HAS A HISTORIC AND CONTINUING RELATIONSHIP WITH THE ORGANIZATION.</ExplanationTxt>
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      <OtherLiabilitiesOrgGrp>
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        <Amt>25002</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>25002</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>12943384</TotalRevEtcAuditedFinclStmtAmt>
      <OtherRevenueAmt>12835466</OtherRevenueAmt>
      <RevenueNotReportedAmt>12835466</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>107918</RevenueSubtotalAmt>
      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>107918</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>12672826</TotExpnsEtcAuditedFinclStmtAmt>
      <OtherExpensesIncludedAmt>12542047</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>12542047</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>130779</ExpensesSubtotalAmt>
      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>130779</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>STELLARIS RECOGNIZES THE EFFECTS OF INCOME TAX POSITIONS ONLY IF THOSE POSITIONS ARE MORE LIKELY THAN NOT TO BE SUSTAINED. IN THE EVENT STELLARIS CONCLUDES THAT IS IS SUBJECT TO INTEREST AND/OR PENALTIES ARISING FROM UNCERTAIN INCOME TAX POSITIONS, STELLARIS WILL PRESENT INTEREST AND PENALTIES AS A COMPONENT OF INCOME TAXES. FOR THE YEAR ENDED DECEMBER 31, 2024, STELLARIS INCURRED NO INTEREST AND PENALTIES RELATED TO INCOME TAX POSITIONS THAT IT HAS TAKEN. MANAGEMENT HAS DETERMINED THAT STELLARIS HAD NO UNCERTAIN TAX POSITIONS THAT WOULD REQUIRE FINANCIAL STATEMENT RECOGNITION AND/OR DISCLOSURE. STELLARIS IS NO LONGER SUBJECT TO EXAMINATIONS BY APPLICABLE TAXING JURISDICTIONS FOR PERIODS PRIOR TO 2021.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>REVENUE ATTRIBUTABLE TO CONSOLIDATED SUBSIDIARY 12,835,466.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>EXPENSES ATTRIBUTABLE TO CONSOLIDATED SUBSIDIARY 12,542,047.</ExplanationTxt>
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      <SupplementalNonqualRtrPlanInd>1</SupplementalNonqualRtrPlanInd>
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      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
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        <PersonNm>SUSAN FOX</PersonNm>
        <TitleTxt>CHAIR</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>2212423</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>1900000</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>452138</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>589500</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>32443</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>5186504</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>412500</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>PAUL DUNPHEY</PersonNm>
        <TitleTxt>VICE CHAIR</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>766293</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>514671</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>107681</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>58704</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>57711</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>1505060</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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        <FormAndLineReferenceDesc>PART I, LINE 4B</FormAndLineReferenceDesc>
        <ExplanationTxt>SUSAN FOX PARTICIPATES IN A 457F PLAN THROUGH WHITE PLAINS HOSPITAL MEDICAL CENTER. SHE RECEIVED A TAXABLE DISTRIBUTION PAYMENT IN THE AMOUNT OF $412,500 IN 2024.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE J, PART II:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE OFFICERS LISTED ON PART VII AND SCHEDULE J OF THE STELLARIS FORM 990 DO NOT RECEIVE COMPENSATION AS OFFICERS OF STELLARIS, BUT AS OFFICERS OF THEIR RELATED HOSPITAL ORGANIZATIONS. THIS COMPENSATION IS PAID SOLELY BY RELATED ORGANIZATIONS.</ExplanationTxt>
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        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>HEALTHSTAR NETWORK INC. D/B/A STELLARIS HEALTH NETWORK'S FORM 990 FOR THE YEAR ENDING DECEMBER 31, 2024 WAS REVIEWED IN DETAIL BY THE ORGANIZATION'S VICE CHAIR AND SECRETARY AND, WITH THE EXCEPTION OF THE OF SCHEDULE J, WAS REVIEWED BY THE ORGANIZATION'S ENTIRE BOARD. THE BOARD WAS PROVIDED A PAPER DRAFT OF THE FORM 990 PRIOR TO FILING TO REVIEW AND TO PROVIDE COMMENTS TO THE ORGANIZATION'S TAX PREPARER PKF O'CONNOR DAVIES ADVISORY, LLC AT A BOARD MEETING, WHERE THE FORM 990 WAS PRESENTED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>HEALTHSTAR NETWORK INC. D/B/A STELLARIS HEALTH NETWORK'S CONFLICT OF INTEREST POLICY IS DISTRIBUTED TO OFFICERS, DIRECTORS, SENIOR MANAGERS, OTHER EMPLOYEES AND VOLUNTEERS. ANNUALLY, A QUESTIONNAIRE IS COMPLETED BY ALL OFFICERS AND DIRECTORS IN WHICH THEY ARE ASKED SPECIFIC QUESTIONS AND DISCLOSE INFORMATION REGARDING ACTUAL OR POTENTIAL CONFLICTS BETWEEN STELLARIS AND THEMSELVES OR CERTAIN RELATED PARTIES (AS DEFINED IN THE INSTRUCTIONS TO THE FORM 990). THESE QUESTIONNAIRES ARE COLLECTED AND REVIEWED ANNUALLY TO ENSURE COMPLIANCE WITH STELLARIS' CONFLICT OF INTEREST POLICY. IF OFFICERS, DIRECTORS, OR EMPLOYEES NEED TO COMPLETE OR UPDATE THEIR DISCLOSURE STATEMENT, OR MAKE A REPORT, THEY SHOULD CONTACT STELLARIS' CURRENT COMPLIANCE OFFICER. IN GENERAL, IF A CONFLICT IS IDENTIFIED, STEPS WILL BE TAKEN TO ENSURE THERE IS NO ACTUAL OR PERCEIVED UNDUE INFLUENCE. SUCH STEPS COULD INCLUDE PROHIBITING THE CONFLICTED PERSON FROM PARTICIPATING IN ANY DECISION REGARDING THE SUBJECT MATTER OR REQUIRING AN AUDIT OF UTILIZATION PATTERNS. IF THE CONFLICTED PERSON IS A BOARD MEMBER OR A KEY EMPLOYEE, ADDITIONAL STEPS MAY BE TAKEN, SUCH AS BEING EXCUSED FROM THE SPECIFIC NEGOTIATION OR FROM PARTICIPATION IN A COMMITTEE MEETING. THE GOAL IS TO ENSURE TRANSPARENCY IN THE TRANSACTION, THAT THE TRANSACTION IS FAIR AND REASONABLE TO STELLARIS, AND THAT THERE IS NO ADVERSE IMPACT ON PATIENT CARE OR SAFETY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>HEALTHSTAR NETWORK INC. D/B/A STELLARIS HEALTH NETWORK'S FINANCIAL STATEMENTS, GOVERNING DOCUMENTS AND CONFLICT OF INTEREST POLICY ARE AVAILABLE TO THE PUBLIC UPON REQUEST, AND AT THE DISCRETION OF MANAGEMENT. STELLARIS MAKES ITS FORM 990 AVAILABLE FOR PUBLIC INSPECTION AS REQUIRED UNDER SECTION 6104 OF THE INTERNAL REVENUE CODE. THE RETURN IS POSTED ON GUIDESTAR.ORG AND OTHER SIMILAR WEBSITES.</ExplanationTxt>
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          <BusinessNameLine1Txt>STARNET EMERGENCY SERVICES</BusinessNameLine1Txt>
        </DisregardedEntityName>
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          <AddressLine1Txt>45 KENSICO DRIVE</AddressLine1Txt>
          <CityNm>MOUNT KISCO</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>10549</ZIPCd>
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        <LegalDomicileStateCd>NY</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
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          <AddressLine1Txt>41 EAST POST ROAD</AddressLine1Txt>
          <CityNm>WHITE PLAINS</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>10601</ZIPCd>
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        <LegalDomicileStateCd>NY</LegalDomicileStateCd>
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          <AddressLine1Txt>525 EAST 68TH STREET</AddressLine1Txt>
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          <StateAbbreviationCd>NY</StateAbbreviationCd>
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        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
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          <BusinessNameLine1Txt>PHELPS MEMORIAL HOSPITAL ASSOC</BusinessNameLine1Txt>
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          <AddressLine1Txt>701 NORTH BROADWAY</AddressLine1Txt>
          <CityNm>SLEEPY HOLLOW</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>10591</ZIPCd>
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        <EIN>131725076</EIN>
        <PrimaryActivitiesTxt>HOSPITAL</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>NY</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>LINE 3</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
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      <GiftGrntOrCapContriToOthOrgInd>0</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>0</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>0</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>0</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>0</DivRelatedOrganizationInd>
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      <RentalOfFacilitiesToOthOrgInd>0</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>0</RentalOfFcltsFromOthOrgInd>
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      <PerformOfServicesByOtherOrgInd>0</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>1</SharingOfFacilitiesInd>
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      <ReimbursementPaidToOtherOrgInd>1</ReimbursementPaidToOtherOrgInd>
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      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
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</Return>