assertion  retraction  graph  subject    predicate        object    datatype    annotation
1          0           graph  DOID:5446  rdfs:subClassOf  DOID:173  _IRI        
1          0           graph  DOID:2079  rdfs:subClassOf  DOID:173  _IRI        
1          0           graph  DOID:5442  rdfs:subClassOf  DOID:173  _IRI        
1          0           graph  DOID:173   oio:id           DOID:173  xsd:string