assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_17334  rdfs:label       penicillin       xsd:string  
1          0           graph  obo:CHEBI_17334  oio:id           CHEBI:17334      xsd:string  
1          0           graph  obo:CHEBI_17334  rdfs:subClassOf  obo:CHEBI_25865  _IRI        
1          0           graph  obo:CHEBI_17334  rdf:type         owl:Class        _IRI