assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:5259 IAO:0000115 A leiomyosarcoma and sarcoma of colon that is located_in the colon. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://coloncancer.about.com/od/typesofcancer/a/Leiomyosarcoma.htm""}]}"