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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>PHILIP B HOWELLS DDS</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>4.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>KATHLEEN BOYCE</PersonNm>
        <TitleTxt>CHIEF FINANCIAL OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>35.00</AverageHoursPerWeekRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>156009</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>18162</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>ROBERT BOOSE</PersonNm>
        <TitleTxt>EXECUTIVE DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>35.00</AverageHoursPerWeekRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>304074</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>57702</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>KAREN RAFIELD</PersonNm>
        <TitleTxt>ASST. EXEC. DIR.</TitleTxt>
        <AverageHoursPerWeekRt>35.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>142582</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>15645</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>SHANNON MCCARTY</PersonNm>
        <TitleTxt>DIRECTOR - SALES</TitleTxt>
        <AverageHoursPerWeekRt>35.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>101928</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>15704</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>LOIS HOLT</PersonNm>
        <TitleTxt>SNR. DIR. EXEC. OFFICE OPS.</TitleTxt>
        <AverageHoursPerWeekRt>35.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>100278</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>15973</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>804871</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>123186</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>5</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>1</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1>MASSACHUSETTS CONVENTION CENTER AUTHORIT</BusinessNameLine1>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1>415 SUMMER ST</AddressLine1>
            <City>BOSTON</City>
            <State>MA</State>
            <ZIPCode>02210</ZIPCode>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>CONVENTION &amp; EXHIBIT SERVICES</ServicesDesc>
        <CompensationAmt>427713</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1>LEVY RESTARANTS AT THE BCEC</BusinessNameLine1>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1>980 N MICHIGAN AVE</AddressLine1>
            <City>CHICAGO</City>
            <State>IL</State>
            <ZIPCode>60611</ZIPCode>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>CATERING SERVICES</ServicesDesc>
        <CompensationAmt>279071</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1>EFFECTIVE DATABASE MANAGEMENT LLC</BusinessNameLine1>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1>42 MAIN STREET</AddressLine1>
            <City>HUDSON</City>
            <State>MA</State>
            <ZIPCode>01749</ZIPCode>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>CREDIT CARD SERVICES</ServicesDesc>
        <CompensationAmt>248459</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1>PROJECTION INC</BusinessNameLine1>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1>415 SUMMER ST</AddressLine1>
            <City>BOSTON</City>
            <State>MA</State>
            <ZIPCode>02210</ZIPCode>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>AUDIO/VISUAL SERVICES</ServicesDesc>
        <CompensationAmt>246957</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1>THE CASTLE GROUP INC</BusinessNameLine1>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1>640 TEN ROD RD</AddressLine1>
            <City>NORTH KINGSTOWN</City>
            <State>RI</State>
            <ZIPCode>02852</ZIPCode>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>TRANSPORTATION</ServicesDesc>
        <CompensationAmt>216279</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>5</CntrctRcvdGreaterThan100KCnt>
      <ProgramServiceRevenueGrp>
        <Desc>YANKEE DENTAL CONGRESS</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>6651706</TotalRevenueColumnAmt>
        <UnrelatedBusinessRevenueAmt>69450</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>6582256</ExclusionAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>MEMBERSHIP DUES</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>1956254</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1956254</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>CONFERENCES AND WORKSHOPS</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>379693</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>379693</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>CONTINUING EDUCATION</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>280407</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>280407</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>ADVERTISING</Desc>
        <BusinessCd>541800</BusinessCd>
        <TotalRevenueColumnAmt>115526</TotalRevenueColumnAmt>
        <UnrelatedBusinessRevenueAmt>115526</UnrelatedBusinessRevenueAmt>
      </ProgramServiceRevenueGrp>
      <TotalProgramServiceRevenueAmt>9383586</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>223313</TotalRevenueColumnAmt>
        <ExclusionAmt>223313</ExclusionAmt>
      </InvestmentIncomeGrp>
      <RoyaltiesRevenueGrp>
        <TotalRevenueColumnAmt>301931</TotalRevenueColumnAmt>
        <ExclusionAmt>301931</ExclusionAmt>
      </RoyaltiesRevenueGrp>
      <GrossRentsGrp>
        <RealAmt>403393</RealAmt>
      </GrossRentsGrp>
      <LessRentalExpensesGrp>
        <RealAmt>503260</RealAmt>
      </LessRentalExpensesGrp>
      <RentalIncomeOrLossGrp>
        <RealAmt>-99867</RealAmt>
      </RentalIncomeOrLossGrp>
      <NetRentalIncomeOrLossGrp>
        <TotalRevenueColumnAmt>-99867</TotalRevenueColumnAmt>
        <UnrelatedBusinessRevenueAmt>-88073</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>-11794</ExclusionAmt>
      </NetRentalIncomeOrLossGrp>
      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>1652670</SecuritiesAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>1088676</SecuritiesAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>563994</SecuritiesAmt>
      </GainOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>563994</TotalRevenueColumnAmt>
        <ExclusionAmt>563994</ExclusionAmt>
      </NetGainOrLossInvestmentsGrp>
      <OtherRevenueMiscGrp>
        <Desc>EQUITY IN WHOLLY OWNED SUBSIDIARY</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>16839</TotalRevenueColumnAmt>
        <ExclusionAmt>16839</ExclusionAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueMiscGrp>
        <Desc>MANAGEMENT FEE</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>16067</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>16067</RelatedOrExemptFuncIncomeAmt>
      </OtherRevenueMiscGrp>
      <MiscellaneousRevenueGrp>
        <TotalRevenueColumnAmt>105530</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>105530</RelatedOrExemptFuncIncomeAmt>
      </MiscellaneousRevenueGrp>
      <OtherRevenueTotalAmt>138436</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>10511393</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>2737951</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>96903</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>7676539</ExclusionAmt>
      </TotalRevenueGrp>
      <GrantsToDomesticOrgsGrp>
        <TotalAmt>71125</TotalAmt>
      </GrantsToDomesticOrgsGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>535943</TotalAmt>
      </CompCurrentOfcrDirectorsGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>2390535</TotalAmt>
      </OtherSalariesAndWagesGrp>
      <PensionPlanContributionsGrp>
        <TotalAmt>172005</TotalAmt>
      </PensionPlanContributionsGrp>
      <OtherEmployeeBenefitsGrp>
        <TotalAmt>210924</TotalAmt>
      </OtherEmployeeBenefitsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>226975</TotalAmt>
      </PayrollTaxesGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>56598</TotalAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>62849</TotalAmt>
      </FeesForServicesAccountingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>255684</TotalAmt>
      </OfficeExpensesGrp>
      <InformationTechnologyGrp>
        <TotalAmt>165510</TotalAmt>
      </InformationTechnologyGrp>
      <OccupancyGrp>
        <TotalAmt>104636</TotalAmt>
      </OccupancyGrp>
      <TravelGrp>
        <TotalAmt>17630</TotalAmt>
      </TravelGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>2720477</TotalAmt>
      </ConferencesMeetingsGrp>
      <InterestGrp>
        <TotalAmt>77646</TotalAmt>
      </InterestGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>146147</TotalAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>40626</TotalAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>SEMINARS AND WORKSHOPS</Desc>
        <TotalAmt>375084</TotalAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>MISCELLANEOUS</Desc>
        <TotalAmt>310513</TotalAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>PUBLIC AWARENESS PROGRA</Desc>
        <TotalAmt>292747</TotalAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>BANK FEES</Desc>
        <TotalAmt>233730</TotalAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>730961</TotalAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>9198345</TotalAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>774344</BOYAmt>
        <EOYAmt>1609767</EOYAmt>
      </CashNonInterestBearingGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>924836</BOYAmt>
        <EOYAmt>1218532</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <AccountsReceivableGrp>
        <BOYAmt>1414357</BOYAmt>
        <EOYAmt>1443084</EOYAmt>
      </AccountsReceivableGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>549537</BOYAmt>
        <EOYAmt>530806</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>8008942</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>2800984</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>5340569</BOYAmt>
        <EOYAmt>5207958</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <InvestmentsPubTradedSecGrp>
        <BOYAmt>7626857</BOYAmt>
        <EOYAmt>8334163</EOYAmt>
      </InvestmentsPubTradedSecGrp>
      <InvestmentsOtherSecuritiesGrp>
        <BOYAmt>327314</BOYAmt>
        <EOYAmt>344153</EOYAmt>
      </InvestmentsOtherSecuritiesGrp>
      <OtherAssetsTotalGrp>
        <BOYAmt>25199</BOYAmt>
        <EOYAmt>21684</EOYAmt>
      </OtherAssetsTotalGrp>
      <TotalAssetsGrp>
        <BOYAmt>16983013</BOYAmt>
        <EOYAmt>18710147</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>891832</BOYAmt>
        <EOYAmt>941804</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <DeferredRevenueGrp>
        <BOYAmt>3406307</BOYAmt>
        <EOYAmt>3687978</EOYAmt>
      </DeferredRevenueGrp>
      <MortgNotesPyblScrdInvstPropGrp>
        <BOYAmt>4310041</BOYAmt>
        <EOYAmt>4135397</EOYAmt>
      </MortgNotesPyblScrdInvstPropGrp>
      <OtherLiabilitiesGrp>
        <BOYAmt>295976</BOYAmt>
        <EOYAmt>419201</EOYAmt>
      </OtherLiabilitiesGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>8904156</BOYAmt>
        <EOYAmt>9184380</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsSFAS117Ind>X</OrganizationFollowsSFAS117Ind>
      <UnrestrictedNetAssetsGrp>
        <BOYAmt>8078857</BOYAmt>
        <EOYAmt>9525767</EOYAmt>
      </UnrestrictedNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>8078857</BOYAmt>
        <EOYAmt>9525767</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>16983013</BOYAmt>
        <EOYAmt>18710147</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>1313048</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>133862</NetUnrlzdGainsLossesInvstAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <ConsolidatedBasisFinclStmtInd>X</ConsolidatedBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleC documentId="RetDoc1039700001">
      <SubstantiallyAllDuesNondedInd>0</SubstantiallyAllDuesNondedInd>
      <OnlyInHouseLobbyingInd>0</OnlyInHouseLobbyingInd>
      <AgreeCarryoverPriorYearInd>0</AgreeCarryoverPriorYearInd>
      <DuesAssessmentsAmt>1956254</DuesAssessmentsAmt>
      <NonDeductibleLbbyngPltclCYAmt>464752</NonDeductibleLbbyngPltclCYAmt>
      <NonDeductibleLbbyngPltclTotAmt>464752</NonDeductibleLbbyngPltclTotAmt>
      <AggregateReportedDuesNtcAmt>547434</AggregateReportedDuesNtcAmt>
      <TaxableAmt>-82682</TaxableAmt>
    </IRS990ScheduleC>
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <LandGrp>
        <OtherCostOrOtherBasisAmt>925873</OtherCostOrOtherBasisAmt>
        <BookValueAmt>925873</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>5123549</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>1352579</DepreciationAmt>
        <BookValueAmt>3770970</BookValueAmt>
      </BuildingsGrp>
      <LeaseholdImprovementsGrp>
        <OtherCostOrOtherBasisAmt>383784</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>136006</DepreciationAmt>
        <BookValueAmt>247778</BookValueAmt>
      </LeaseholdImprovementsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>896953</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>831096</DepreciationAmt>
        <BookValueAmt>65857</BookValueAmt>
      </EquipmentGrp>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>678783</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>481303</DepreciationAmt>
        <BookValueAmt>197480</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>5207958</TotalBookValueLandBuildingsAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>CUSTOMER DEPOSITS</Desc>
        <Amt>37399</Amt>
      </OtherLiabilitiesOrgGrp>
      <OtherLiabilitiesOrgGrp>
        <Desc>DUE TO RELATED PARTY</Desc>
        <Amt>247766</Amt>
      </OtherLiabilitiesOrgGrp>
      <OtherLiabilitiesOrgGrp>
        <Desc>MISCELLANEOUS</Desc>
        <Amt>134036</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>419201</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>MDA AND AFFILIATES ACCOUNT FOR UNCERTAINTY IN INCOME TAXES IN ACCORDANCE WITH ASC TOPIC, INCOME TAXES. THIS STANDARD CLARIFIES THE ACCOUNTING FOR UNCERTAINTY IN TAX POSITIONS AND PRESCRIBES A RECOGNITION THRESHOLD AND MEASUREMENT ATTRIBUTE FOR THE FINANCIAL STATEMENT REGARDING A TAX POSITION TAKEN OR EXPECTED TO BE TAKEN IN A TAX RETURN. MDS AND AFFILIATES HAVE DETERMINED THAT THERE ARE NO UNCERTAIN TAX POSITIONS WHICH QUALIFY FOR EITHER RECOGNITION OR DISCLOSURE IN THE CONSOLIDATED FINANCIAL STATEMENTS AT JUNE 30, 2014. MDS AND AFFILIATES' INFORMATION AND TAX RETURNS ARE SUBJECT TO EXAMINATION BY THE FEDERAL AND STATE JURISDICTIONS AND GENERALLY REMAIN OPEN FOR THE MOST RECENT THREE YEARS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1>DCD (DOCTORS CARING FOR DOCTORS)</BusinessNameLine1>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1>PO BOX 716</AddressLine1>
          <City>ANDOVER</City>
          <State>MA</State>
          <ZIPCode>01810</ZIPCode>
        </USAddress>
        <IRCSectionDesc>170(B)(1)(A)(V)</IRCSectionDesc>
        <CashGrantAmt>48000</CashGrantAmt>
        <PurposeOfGrantTxt>THESE GRANT MONIES SUPPORT THE ACITIVITIES OF THAT ORGANIZATION THAT WORKS IN CONJUNCTION WITH THE MDS WELL-BEING COMMITTEE. MDS HAS PAID OUT THIS GRANT FOR MANY YEARS AND IT IS PAID IN EQUAL MONTHLY INSTALLMENTS OVER THE COURSE OF THE FISCAL YEAR.</PurposeOfGrantTxt>
      </RecipientTable>
      <Total501c3OrgCnt>1</Total501c3OrgCnt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>GRANTS MADE BY MDS AND THE DISTRICTS PROVIDED FUNDING FOR VARIOUS DENTAL PROGRAMS. GRANTEES ARE REQUIRED TO SUBMIT REPORTS DETAILING HOW GRANT FUNDS WERE SPENT.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
      <WrittenEmploymentContractInd>X</WrittenEmploymentContractInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KATHLEEN BOYCE</PersonNm>
        <TitleTxt>CHIEF FINANCIAL OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>156009</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>11469</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>6693</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ROBERT BOOSE</PersonNm>
        <TitleTxt>EXECUTIVE DIRECTOR</TitleTxt>
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        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KAREN RAFIELD</PersonNm>
        <TitleTxt>ASST. EXEC. DIR.</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>11983</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>3662</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>158227</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S MEMBERSHIP IS COMPRISED OF ORAL HEALTH CARE PROFESSIONALS IN MASSACHUSETTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S MEMBERS ELECT THE DELEGATES, WHO REPRESENT THEM IN VOTING TO ELECT THE GOVERNING BODY, THE BOARD OF TRUSTEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ANNUAL MEETING OF DELEGATES HAS THE RIGHT TO ADDRESS ANY ITEMS OR ACTIONS TAKEN BY THE BOARD DURING THE YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS PROVIDED TO THE TRUSTEES BEFORE FILING. THE CFO REVIEWS THE RETURN PRIOR TO BEING FILED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS PROVIDED TO THE ORGANIZATION'S EXECUTIVE COMMITTEE AND BOARD OF DIRECTORS FOR REVIEW IN ADVANCE OF THE FILING DEADLINE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL BOARD MEMBERS SIGN THE CONFLICT OF INTEREST POLICY AND ANY CONFLICTS ARE ANNOUNCED AT THE BEGINNING OF EACH BOARD MEETING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE EXECUTIVE DIRECTOR'S COMPENSATION IS DETERMINED BY THE COMPENSATION COMMITTEE OF THE BOARD OF TRUSTEES. ALL OTHER OFFICERS AND KEY EMPLOYEES' SALARIES ARE DETERMINED BY THE EXECUTIVE DIRECTOR.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MAKES ITS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="RetDoc1043400001">
      <IdDisregardedEntitiesGrp>
        <DisregardedEntityName>
          <BusinessNameLine1>FIRMIN JOINT VENTURE LLC</BusinessNameLine1>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1>TWO WILLOW STREET SUITE 200</AddressLine1>
          <City>SOUTHBOROUGH</City>
          <State>MA</State>
          <ZIPCode>01745</ZIPCode>
        </USAddress>
        <EIN>043446721</EIN>
        <PrimaryActivitiesTxt>TO OWN MDS' PRINCIPAL PROPERTY</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <TotalIncomeAmt>813190</TotalIncomeAmt>
        <EndOfYearAssetsAmt>4701093</EndOfYearAssetsAmt>
        <DirectControllingEntityName>
          <BusinessNameLine1>MASSACHUSETTS DENTAL SOCIETY</BusinessNameLine1>
        </DirectControllingEntityName>
      </IdDisregardedEntitiesGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1>MDS FOUNDATION INC</BusinessNameLine1>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1>TWO WILLOW STREET SUITE 200</AddressLine1>
          <City>SOUTHBOROUGH</City>
          <State>MA</State>
          <ZIPCode>01715</ZIPCode>
        </USAddress>
        <EIN>043466040</EIN>
        <PrimaryActivitiesTxt>IMPROVE ORAL HEALTH CARE OF MASSACHUSETTS RESIDENTS</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>LINE 11C, III-FI</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1>MASSACHUSETTS DENTAL SOCIETY</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
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      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1>MASSACHUSETTS DENTAL SOCIETY RELIEF FUND INC</BusinessNameLine1>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1>TWO WILLOW STREET SUITE 200</AddressLine1>
          <City>SOUTHBOROUGH</City>
          <State>MA</State>
          <ZIPCode>01715</ZIPCode>
        </USAddress>
        <EIN>046139122</EIN>
        <PrimaryActivitiesTxt>HELP DENTISTS IN NEED</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>LINE 11A, I</PublicCharityStatusTxt>
        <DirectControllingEntityName>
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        </DirectControllingEntityName>
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        <RelatedOrganizationName>
          <BusinessNameLine1>MDS INSURANCE SERVICES INC</BusinessNameLine1>
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          <AddressLine1>TWO WILLOW STREET SUITE 200</AddressLine1>
          <City>SOUTHBOROUGH</City>
          <State>MA</State>
          <ZIPCode>01745</ZIPCode>
        </USAddress>
        <EIN>043432374</EIN>
        <PrimaryActivitiesTxt>INSURANCE AGENT</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1>MASSACHUSETTS DENTAL SOCIETY</BusinessNameLine1>
        </DirectControllingEntityName>
        <EntityTypeTxt>C</EntityTypeTxt>
        <ShareOfTotalIncomeAmt>30930</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>347486</ShareOfEOYAssetsAmt>
        <OwnershipPct>1.00000</OwnershipPct>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>0</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>0</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>0</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>0</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>0</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>0</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>0</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>0</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>0</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>0</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>0</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>0</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>0</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>0</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>0</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>1</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>1</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1>MDS FOUNDATION INC</BusinessNameLine1>
        </OtherOrganizationName>
        <TransactionTypeTxt>Q</TransactionTypeTxt>
        <InvolvedAmt>4266</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>AMOUNT DUE TO MDSF</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1>MDS INSURANCE SERVICES INC</BusinessNameLine1>
        </OtherOrganizationName>
        <TransactionTypeTxt>Q</TransactionTypeTxt>
        <InvolvedAmt>245000</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>AMOUNT DUE TO MDSIS</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1>MDS RELIEF FUND</BusinessNameLine1>
        </OtherOrganizationName>
        <TransactionTypeTxt>P</TransactionTypeTxt>
        <InvolvedAmt>1500</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>AMOUNT DUE FROM MDSRF</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
    </IRS990ScheduleR>
  </ReturnData>
</Return>