assertion  retraction  graph  subject         predicate        object                 datatype    annotation
1          0           graph  obo:CHEBI_5686  rdfs:label       heterocyclic compound  xsd:string  
1          0           graph  obo:CHEBI_5686  oio:id           CHEBI:5686             xsd:string  
1          0           graph  obo:CHEBI_5686  rdfs:subClassOf  obo:CHEBI_33595        _IRI        
1          0           graph  obo:CHEBI_5686  rdf:type         owl:Class              _IRI