assertion  retraction  graph  subject       predicate        object     datatype    annotation
1          0           graph  DOID:4926     oio:id           DOID:4926  xsd:string  
1          0           graph  DOID:0080186  rdfs:subClassOf  DOID:4926  _IRI        
1          0           graph  DOID:0080185  rdfs:subClassOf  DOID:4926  _IRI        
1          0           graph  DOID:0080184  rdfs:subClassOf  DOID:4926  _IRI