assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:6171  rdfs:subClassOf  DOID:4114  _IRI        
1          0           graph  DOID:7281  rdfs:subClassOf  DOID:4114  _IRI        
1          0           graph  DOID:4114  oio:id           DOID:4114  xsd:string  
1          0           graph  DOID:4113  rdfs:subClassOf  DOID:4114  _IRI