assertion  retraction  graph  subject    predicate    object                                                                                                                                                                            datatype    annotation
1          0           graph  DOID:7409  IAO:0000115  A vulva squamous cell carcinoma that is composed of polygonal squamous cells growing in sheets or nests that may have intercellular bridges, but keratin pearls are not present.  xsd:string  "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4374790/""}]}"