assertion  retraction  graph  subject       predicate        object    datatype    annotation
1          0           graph  DOID:0050269  rdfs:subClassOf  DOID:732  _IRI        
1          0           graph  DOID:734      rdfs:subClassOf  DOID:732  _IRI        
1          0           graph  DOID:732      oio:id           DOID:732  xsd:string  
1          0           graph  DOID:730      rdfs:subClassOf  DOID:732  _IRI