assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:6139  rdfs:subClassOf  DOID:5289  _IRI        
1          0           graph  DOID:6567  rdfs:subClassOf  DOID:5289  _IRI        
1          0           graph  DOID:5289  oio:id           DOID:5289  xsd:string