assertion  retraction  graph  subject       predicate        object    datatype    annotation
1          0           graph  DOID:0080014  rdfs:subClassOf  DOID:630  _IRI        
1          0           graph  DOID:655      rdfs:subClassOf  DOID:630  _IRI        
1          0           graph  DOID:0050177  rdfs:subClassOf  DOID:630  _IRI        
1          0           graph  DOID:630      oio:id           DOID:630  xsd:string