assertion  retraction  graph  subject          predicate        object                           datatype    annotation
1          0           graph  obo:CHEBI_27171  rdfs:label       organic heterobicyclic compound  xsd:string  
1          0           graph  obo:CHEBI_27171  oio:id           CHEBI:27171                      xsd:string  
1          0           graph  obo:CHEBI_27171  rdfs:subClassOf  obo:CHEBI_38166                  _IRI        
1          0           graph  obo:CHEBI_27171  rdfs:subClassOf  obo:CHEBI_33672                  _IRI        
1          0           graph  obo:CHEBI_27171  rdf:type         owl:Class                        _IRI