assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_23066  rdfs:label       cephalosporin    xsd:string  
1          0           graph  obo:CHEBI_23066  oio:id           CHEBI:23066      xsd:string  
1          0           graph  obo:CHEBI_23066  rdfs:subClassOf  obo:CHEBI_38311  _IRI        
1          0           graph  obo:CHEBI_23066  rdf:type         owl:Class        _IRI