assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:0080167  rdfs:subClassOf  DOID:0080164  _IRI        
1          0           graph  DOID:0080166  rdfs:subClassOf  DOID:0080164  _IRI        
1          0           graph  DOID:0080165  rdfs:subClassOf  DOID:0080164  _IRI        
1          0           graph  DOID:0080164  oio:id           DOID:0080164  xsd:string