assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:0080368  oio:id           DOID:0080368  xsd:string  
1          0           graph  DOID:0080371  rdfs:subClassOf  DOID:0080368  _IRI        
1          0           graph  DOID:0080370  rdfs:subClassOf  DOID:0080368  _IRI