assertion  retraction  graph  subject    predicate        object    datatype    annotation
1          0           graph  DOID:4685  rdfs:subClassOf  DOID:294  _IRI        
1          0           graph  DOID:296   rdfs:subClassOf  DOID:294  _IRI        
1          0           graph  DOID:294   oio:id           DOID:294  xsd:string  
1          0           graph  DOID:293   rdfs:subClassOf  DOID:294  _IRI