assertion  retraction  graph  subject          predicate        object              datatype    annotation
1          0           graph  obo:CHEBI_25865  rdfs:label       penicillanic acids  xsd:string  
1          0           graph  obo:CHEBI_25865  oio:id           CHEBI:25865         xsd:string  
1          0           graph  obo:CHEBI_25865  rdfs:subClassOf  obo:CHEBI_35992     _IRI        
1          0           graph  obo:CHEBI_25865  rdfs:subClassOf  obo:CHEBI_33575     _IRI        
1          0           graph  obo:CHEBI_25865  rdf:type         owl:Class           _IRI