assertion  retraction  graph  subject    predicate    object                                                                                                                                                   datatype    annotation
1          0           graph  DOID:5292  IAO:0000115  A leiomyosarcoma and sarcoma of the mediastinum that derive_from smooth muscle and are usually located_in the esophagus or located_in the main vessels.  xsd:string  "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007645""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://pubmed.ncbi.nlm.nih.gov/33776690/""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://pubmed.ncbi.nlm.nih.gov/34446630/""}]}"