assertion  retraction  graph  subject       predicate        object    datatype    annotation
1          0           graph  DOID:0050750  rdfs:subClassOf  DOID:672  _IRI        
1          0           graph  DOID:710      rdfs:subClassOf  DOID:672  _IRI        
1          0           graph  DOID:265      rdfs:subClassOf  DOID:672  _IRI        
1          0           graph  DOID:672      oio:id           DOID:672  xsd:string