assertion  retraction  graph  subject    predicate    object                                                                                      datatype    annotation
1          0           graph  DOID:4050  IAO:0000115  A sarcoma and malignant mediastinal mesenchymnal tumor that is located_in the mediastinum.  xsd:string  "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.sciencedirect.com/science/article/pii/S1556086415305220""}]}"