assertion  retraction  graph  subject    predicate    object                                                                                                                                  datatype    annotation
1          0           graph  DOID:4012  IAO:0000115  A transitional cell carcinoma that has several papillary fronds with central fibrovascular core lined by transitional type epithelium.  xsd:string  "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.healthline.com/health/papillary-urothelial-carcinoma""}]}"