assertion  retraction  graph  subject       predicate        object     datatype    annotation
1          0           graph  DOID:0081246  rdfs:subClassOf  DOID:3307  _IRI        
1          0           graph  DOID:3307     oio:id           DOID:3307  xsd:string  
1          0           graph  DOID:5566     rdfs:subClassOf  DOID:3307  _IRI        
1          0           graph  DOID:5563     rdfs:subClassOf  DOID:3307  _IRI