assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:0060526  rdfs:subClassOf  DOID:0060524  _IRI        
1          0           graph  DOID:0060524  oio:id           DOID:0060524  xsd:string  
1          0           graph  DOID:0040001  rdfs:subClassOf  DOID:0060524  _IRI