assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:5041 IAO:0000115 A gastrointestinal system cancer that is located_in the esophagus. xsd:string "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007638""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://cancergenome.nih.gov/cancersselected/stomach-esophagealcancer""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://en.wikipedia.org/wiki/Esophagus""}]}"