assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:0080841  oio:id           DOID:0080841  xsd:string  
1          0           graph  DOID:11656    rdfs:subClassOf  DOID:0080841  _IRI        
1          0           graph  DOID:8506     rdfs:subClassOf  DOID:0080841  _IRI        
1          0           graph  DOID:14482    rdfs:subClassOf  DOID:0080841  _IRI