assertion  retraction  graph  subject       predicate        object     datatype    annotation
1          0           graph  DOID:8791     oio:id           DOID:8791  xsd:string  
1          0           graph  DOID:8428     rdfs:subClassOf  DOID:8791  _IRI        
1          0           graph  DOID:0060074  rdfs:subClassOf  DOID:8791  _IRI        
1          0           graph  DOID:3010     rdfs:subClassOf  DOID:8791  _IRI