assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:0080602  oio:id           DOID:0080602  xsd:string  
1          0           graph  DOID:5565     rdfs:subClassOf  DOID:0080602  _IRI        
1          0           graph  DOID:2660     rdfs:subClassOf  DOID:0080602  _IRI