INSERT INTO Nested Table Error

I am running the DMX below and I am getting an error we I go to train my structure.  It is probably something stupid but I do not see the problem.  It seems like the SKIP isn't being recognized but I am not sure.  Here is the error:

INSERT INTO error: The '[MSA].[HospitalID]' nested table key column is not bound to an input rowset column.
DMX:
CREATE MINING STRUCTURE [Hospital_Structure] (
 [HospitalID] LONG KEY,
 [SponsorshipTypeID] LONG DISCRETE,
 [GeographicTypeID] LONG DISCRETE,
 [CaseMixIndex] DOUBLE CONTINUOUS,
 [PercentGovtPayers] DOUBLE CONTINUOUS,
 [TotalNumberInpatientCases] LONG CONTINUOUS,
 [MSA] TABLE (
  [HospitalID] LONG KEY,
  [MSAGroupMember] TEXT DISCRETE
 )
);
GO
 
ALTER MINING STRUCTURE [Hospital_Structure]
ADD MINING MODEL [Hospital_Model] (
 [HospitalID],
 [SponsorshipTypeID],
 [GeographicTypeID],
 [CaseMixIndex],
 [PercentGovtPayers],
 [TotalNumberInpatientCases],
 [MSA] (
  [HospitalID],
  [MSAGroupMember]
 )
) USING Microsoft_Clustering;
GO


INSERT INTO MINING STRUCTURE [Hospital_Structure]
(
 [HospitalID],
 [SponsorshipTypeID],
 [GeographicTypeID],
 [CaseMixIndex],
 [PercentGovtPayers],
 [TotalNumberInpatientCases],
 [MSA] (SKIP, [MSAGroupMember])
)
SHAPE { 
  OPENQUERY([localhost],'
 SELECT
  [HospitalID],
  [SponsorshipTypeID],
  [GeographicTypeID],
  [CaseMixIndex],
  [PercentGovtPayers],
  [TotalNumberInpatientCases]
 FROM
  [dm].[vw_HospitalClustering_Inputs]
 ORDER BY
  [HospitalID]') }
APPEND
(
  {OPENQUERY([localhost],'
 SELECT
  [HospitalID],
  [MSAGroupMember]
 FROM
  [dm].[vw_HospitalClustering_InputsNested]
 ORDER BY
  [HospitalID],
  [MSAGroupMember]')
}
RELATE [HospitalID] TO [HospitalID]
) AS [MSA]

Thanks in advance