assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:5190  rdfs:subClassOf  DOID:4112  _IRI        
1          0           graph  DOID:4112  oio:id           DOID:4112  xsd:string  
1          0           graph  DOID:4111  rdfs:subClassOf  DOID:4112  _IRI