assertion  retraction  graph  subject    predicate    object                                                                                                                                                            datatype    annotation
1          0           graph  DOID:4929  IAO:0000115  An adenocarcinoma that derives_from epithelial cells originating in glandular tissue. The tumor has branched angular tubules embedded in a loose fibrous stroma.  xsd:string  "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.ncbi.nlm.nih.gov/books/NBK553180/""}]}"