assertion  retraction  graph  subject          predicate        object                   datatype    annotation
1          0           graph  obo:CHEBI_33672  rdfs:label       heterobicyclic compound  xsd:string  
1          0           graph  obo:CHEBI_33672  oio:id           CHEBI:33672              xsd:string  
1          0           graph  obo:CHEBI_33672  rdfs:subClassOf  obo:CHEBI_5686           _IRI        
1          0           graph  obo:CHEBI_33672  rdfs:subClassOf  obo:CHEBI_33636          _IRI        
1          0           graph  obo:CHEBI_33672  rdf:type         owl:Class                _IRI