assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:5293  rdfs:subClassOf  DOID:4682  _IRI        
1          0           graph  DOID:3495  rdfs:subClassOf  DOID:4682  _IRI        
1          0           graph  DOID:4682  oio:id           DOID:4682  xsd:string