assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:0060524  rdfs:subClassOf  DOID:0060495  _IRI        
1          0           graph  DOID:0060523  rdfs:subClassOf  DOID:0060495  _IRI        
1          0           graph  DOID:0060495  oio:id           DOID:0060495  xsd:string