Fetching data according to Id

Hii,
I have two methods like

       public IEnumerable<DataAccessModel.Claim> GetAllClaims()
        {
         return   claimDataService.GetClaimRecords();
        }

where Claim table contains Id and other columns like category etc..

        public IEnumerable<DataAccessModel.GroupClaim> GetClaimsForGroup(Guid groupId)
        {
            return groupDataService.GetGroupClaimRecords().Where(x => x.GroupId == groupId);
        }

GroupClaim table cointains ClaimId and GroupId columns where ClaimId corresponds to Id from Claim table

Now I have to populate in a list available ClaimIds ie Ids from Claim table which must not contain Id s from GroupClaim
I have tried out the below code but not working.

     public IEnumerable<DataAccessModel.Claim> AvailableGroupClaims(Guid groupId)
      {
        return claimDataService.GetClaimRecords().Where(y => groupDataService.GetGroupClaimRecords().Where(x => x.GroupId == groupId).Any(a => a.ClaimId != y.Id));
       }