assertion  retraction  graph  subject          predicate        object                                  datatype    annotation
1          0           graph  obo:CHEBI_25558  rdfs:label       organonitrogen heterocyclic antibiotic  xsd:string  
1          0           graph  obo:CHEBI_25558  oio:id           CHEBI:25558                             xsd:string  
1          0           graph  obo:CHEBI_25558  rdfs:subClassOf  obo:CHEBI_38101                         _IRI        
1          0           graph  obo:CHEBI_25558  rdfs:subClassOf  obo:CHEBI_24531                         _IRI        
1          0           graph  obo:CHEBI_25558  rdf:type         owl:Class                               _IRI