assertion  retraction  graph  subject          predicate        object                  datatype    annotation
1          0           graph  obo:CHEBI_87228  rdfs:label       sulfonamide antibiotic  xsd:string  
1          0           graph  obo:CHEBI_87228  oio:id           CHEBI:87228             xsd:string  
1          0           graph  obo:CHEBI_87228  rdfs:subClassOf  obo:CHEBI_35358         _IRI        
1          0           graph  obo:CHEBI_87228  rdf:type         owl:Class               _IRI