assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:0050829  oio:id           DOID:0050829  xsd:string  
1          0           graph  DOID:116      rdfs:subClassOf  DOID:0050829  _IRI        
1          0           graph  DOID:5137     rdfs:subClassOf  DOID:0050829  _IRI        
1          0           graph  DOID:8012     rdfs:subClassOf  DOID:0050829  _IRI