assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:6229  rdfs:subClassOf  DOID:6231  _IRI        
1          0           graph  DOID:5118  rdfs:subClassOf  DOID:6231  _IRI        
1          0           graph  DOID:6315  rdfs:subClassOf  DOID:6231  _IRI        
1          0           graph  DOID:6314  rdfs:subClassOf  DOID:6231  _IRI        
1          0           graph  DOID:6231  oio:id           DOID:6231  xsd:string