assertion  retraction  graph  subject          predicate        object            datatype    annotation
1          0           graph  obo:CHEBI_18208  rdfs:label       benzylpenicillin  xsd:string  
1          0           graph  obo:CHEBI_18208  oio:id           CHEBI:18208       xsd:string  
1          0           graph  obo:CHEBI_18208  rdfs:subClassOf  obo:CHEBI_88187   _IRI        
1          0           graph  obo:CHEBI_18208  rdf:type         owl:Class         _IRI