assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:962   rdfs:subClassOf  DOID:3193  _IRI        
1          0           graph  DOID:4697  rdfs:subClassOf  DOID:3193  _IRI        
1          0           graph  DOID:5940  rdfs:subClassOf  DOID:3193  _IRI        
1          0           graph  DOID:3193  oio:id           DOID:3193  xsd:string