assertion  retraction  graph  subject     predicate        object     datatype    annotation
1          0           graph  DOID:11920  rdfs:subClassOf  DOID:3225  _IRI        
1          0           graph  DOID:248    rdfs:subClassOf  DOID:3225  _IRI        
1          0           graph  DOID:8802   rdfs:subClassOf  DOID:3225  _IRI        
1          0           graph  DOID:3225   oio:id           DOID:3225  xsd:string