assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:4227  rdfs:subClassOf  DOID:5165  _IRI        
1          0           graph  DOID:5289  rdfs:subClassOf  DOID:5165  _IRI        
1          0           graph  DOID:5165  oio:id           DOID:5165  xsd:string