assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:10619 IAO:0000115 A lymphatic system cancer that is located_in the lymph node. xsd:string "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007637""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://www.cancer.org/cancer/cancerbasics/lymph-nodes-and-cancer""}]}"