assertion  retraction  graph  subject    predicate    object                                                                                                   datatype    annotation
1          0           graph  DOID:4015  IAO:0000115  A carcinoma that is characterized by the presence of spindle cells and anaplastic morphologic features.  xsd:string  "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI_Thesaurus&ns=ncit&code=C27004""}]}"