assertion  retraction  graph  subject          predicate        object             datatype    annotation
1          0           graph  obo:CHEBI_33636  rdfs:label       bicyclic compound  xsd:string  
1          0           graph  obo:CHEBI_33636  oio:id           CHEBI:33636        xsd:string  
1          0           graph  obo:CHEBI_33636  rdfs:subClassOf  obo:CHEBI_33595    _IRI        
1          0           graph  obo:CHEBI_33636  rdf:type         owl:Class          _IRI