assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:8161  rdfs:subClassOf  DOID:3962  _IRI        
1          0           graph  DOID:3964  rdfs:subClassOf  DOID:3962  _IRI        
1          0           graph  DOID:3962  oio:id           DOID:3962  xsd:string