assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:4905 IAO:0000115 A pancreas cancer that derives_from epithelial cells located_in the exocrine pancreas. xsd:string "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007637""},{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007638""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://en.wikipedia.org/wiki/Carcinoma""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://www.cancer.gov/cancertopics/types/pancreatic""}]}"