assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:1795 IAO:0000115 A pancreatic cancer that arises from the epithelial cells of the exocrine pancreatic tissue. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI_Thesaurus&ns=ncit&code=C7430""}]}"