assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:4679  rdfs:subClassOf  DOID:4680  _IRI        
1          0           graph  DOID:5514  rdfs:subClassOf  DOID:4680  _IRI        
1          0           graph  DOID:7541  rdfs:subClassOf  DOID:4680  _IRI        
1          0           graph  DOID:4680  oio:id           DOID:4680  xsd:string