assertion  retraction  graph  subject   predicate    object                                                                                                                                        datatype    annotation
1          0           graph  DOID:338  IAO:0000115  A central nervous system cancer develops from schwann cells located_in cranial nerves, has_material_basis_in abnormally proliferating cells.  xsd:string  "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007638""},{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007645""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://en.wikipedia.org/wiki/Schwannoma""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://link.springer.com/chapter/10.1007/978-3-642-02874-8_15""}]}"