assertion  retraction  graph  subject       predicate        object      datatype    annotation
1          0           graph  DOID:12603    oio:id           DOID:12603  xsd:string  
1          0           graph  DOID:0081076  rdfs:subClassOf  DOID:12603  _IRI        
1          0           graph  DOID:9953     rdfs:subClassOf  DOID:12603  _IRI        
1          0           graph  DOID:9952     rdfs:subClassOf  DOID:12603  _IRI