assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:0050749  oio:id           DOID:0050749  xsd:string  
1          0           graph  DOID:0070333  rdfs:subClassOf  DOID:0050749  _IRI        
1          0           graph  DOID:0111147  rdfs:subClassOf  DOID:0050749  _IRI        
1          0           graph  DOID:0060061  rdfs:subClassOf  DOID:0050749  _IRI