assertion  retraction  graph  subject       predicate        object     datatype    annotation
1          0           graph  DOID:0060338  rdfs:subClassOf  DOID:3246  _IRI        
1          0           graph  DOID:3246     oio:id           DOID:3246  xsd:string  
1          0           graph  DOID:3255     rdfs:subClassOf  DOID:3246  _IRI