PREFIX  rsyn: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT  ?b ?y
WHERE
    { ?b rsyn:type rsyn:Bag .
      ?b ?x ?y . 
      FILTER ( ! ( ( str(?x) = str(rsyn:type) ) && ( str(?y) = str(rsyn:Bag) ) ) ) .
    }