assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:4239  rdfs:subClassOf  DOID:4043  _IRI        
1          0           graph  DOID:3247  rdfs:subClassOf  DOID:4043  _IRI        
1          0           graph  DOID:4043  oio:id           DOID:4043  xsd:string