assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:5409  oio:id           DOID:5409  xsd:string  
1          0           graph  DOID:5414  rdfs:subClassOf  DOID:5409  _IRI        
1          0           graph  DOID:5411  rdfs:subClassOf  DOID:5409  _IRI        
1          0           graph  DOID:5421  rdfs:subClassOf  DOID:5409  _IRI