assertion  retraction  graph  subject    predicate    object                                                              datatype    annotation
1          0           graph  DOID:4682  IAO:0000115  A cholangiocarcinoma that arises from the extrahepatic bile ducts.  xsd:string  "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.cancer.gov/publications/dictionaries/cancer-terms/def/extrahepatic-bile-duct-cancer""}]}"