assertion  retraction  graph  subject   predicate    object                                                                                                                                                                                               datatype    annotation
1          0           graph  DOID:502  IAO:0000115  A central nervous system cancer that is characterized by mesenchymal tumors within the CNS that develops from meninges, has_material_basis_in abnormally proliferating cells derives_from mesoderm.  xsd:string  "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007645""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.ncbi.nlm.nih.gov/pubmed/1669699""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.sciencedirect.com/science/article/pii/B978032344941000014X""}]}"