assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:7191  rdfs:subClassOf  DOID:3269  _IRI        
1          0           graph  DOID:3269  oio:id           DOID:3269  xsd:string  
1          0           graph  DOID:3267  rdfs:subClassOf  DOID:3269  _IRI