assertion  retraction  graph  subject       predicate        object     datatype    annotation
1          0           graph  DOID:0080798  rdfs:subClassOf  DOID:8761  _IRI        
1          0           graph  DOID:0080794  rdfs:subClassOf  DOID:8761  _IRI        
1          0           graph  DOID:8761     oio:id           DOID:8761  xsd:string