assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:7826  rdfs:subClassOf  DOID:5058  _IRI        
1          0           graph  DOID:5058  oio:id           DOID:5058  xsd:string  
1          0           graph  DOID:5057  rdfs:subClassOf  DOID:5058  _IRI