assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_33833  rdfs:label       heteroarene      xsd:string  
1          0           graph  obo:CHEBI_33833  oio:id           CHEBI:33833      xsd:string  
1          0           graph  obo:CHEBI_33833  rdfs:subClassOf  obo:CHEBI_33659  _IRI        
1          0           graph  obo:CHEBI_33833  rdfs:subClassOf  obo:CHEBI_24532  _IRI        
1          0           graph  obo:CHEBI_33833  rdf:type         owl:Class        _IRI