assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:6339  rdfs:subClassOf  DOID:2098  _IRI        
1          0           graph  DOID:6448  rdfs:subClassOf  DOID:2098  _IRI        
1          0           graph  DOID:2098  oio:id           DOID:2098  xsd:string  
1          0           graph  DOID:2097  rdfs:subClassOf  DOID:2098  _IRI