assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:6697  rdfs:subClassOf  DOID:3360  _IRI        
1          0           graph  DOID:6696  rdfs:subClassOf  DOID:3360  _IRI        
1          0           graph  DOID:3360  oio:id           DOID:3360  xsd:string