assertion  retraction  graph  subject     predicate    object                                                      datatype    annotation
1          0           graph  DOID:10020  IAO:0000115  A duodenum cancer that is located_in the ampulla of Vater.  xsd:string  "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://pubmed.ncbi.nlm.nih.gov/25485917/""}]}"