assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:0050909  rdfs:subClassOf  DOID:0050748  _IRI        
1          0           graph  DOID:0050748  oio:id           DOID:0050748  xsd:string  
1          0           graph  DOID:0080211  rdfs:subClassOf  DOID:0050748  _IRI        
1          0           graph  DOID:0050750  rdfs:subClassOf  DOID:0050748  _IRI