assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:0081416  rdfs:subClassOf  DOID:0081413  _IRI        
1          0           graph  DOID:0081415  rdfs:subClassOf  DOID:0081413  _IRI        
1          0           graph  DOID:0081414  rdfs:subClassOf  DOID:0081413  _IRI        
1          0           graph  DOID:0081413  oio:id           DOID:0081413  xsd:string