assertion  retraction  graph  subject    predicate        object   datatype    annotation
1          0           graph  DOID:1247  rdfs:subClassOf  DOID:74  _IRI        
1          0           graph  DOID:2531  rdfs:subClassOf  DOID:74  _IRI        
1          0           graph  DOID:2355  rdfs:subClassOf  DOID:74  _IRI        
1          0           graph  DOID:4961  rdfs:subClassOf  DOID:74  _IRI        
1          0           graph  DOID:74    oio:id           DOID:74  xsd:string  
1          0           graph  DOID:9500  rdfs:subClassOf  DOID:74  _IRI