assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:6041  rdfs:subClassOf  DOID:6438  _IRI        
1          0           graph  DOID:7041  rdfs:subClassOf  DOID:6438  _IRI        
1          0           graph  DOID:6438  oio:id           DOID:6438  xsd:string  
1          0           graph  DOID:6525  rdfs:subClassOf  DOID:6438  _IRI        
1          0           graph  DOID:6996  rdfs:subClassOf  DOID:6438  _IRI