assertion  retraction  graph  subject          predicate        object                             datatype    annotation
1          0           graph  obo:CHEBI_38166  rdfs:label       organic heteropolycyclic compound  xsd:string  
1          0           graph  obo:CHEBI_38166  oio:id           CHEBI:38166                        xsd:string  
1          0           graph  obo:CHEBI_38166  rdfs:subClassOf  obo:CHEBI_33671                    _IRI        
1          0           graph  obo:CHEBI_38166  rdfs:subClassOf  obo:CHEBI_24532                    _IRI        
1          0           graph  obo:CHEBI_38166  rdf:type         owl:Class                          _IRI