assertion  retraction  graph  subject          predicate        object                  datatype    annotation
1          0           graph  obo:CHEBI_38179  rdfs:label       monocyclic heteroarene  xsd:string  
1          0           graph  obo:CHEBI_38179  oio:id           CHEBI:38179             xsd:string  
1          0           graph  obo:CHEBI_38179  rdfs:subClassOf  obo:CHEBI_33833         _IRI        
1          0           graph  obo:CHEBI_38179  rdf:type         owl:Class               _IRI