assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_38311  rdfs:label       cephem           xsd:string  
1          0           graph  obo:CHEBI_38311  oio:id           CHEBI:38311      xsd:string  
1          0           graph  obo:CHEBI_38311  rdfs:subClassOf  obo:CHEBI_38106  _IRI        
1          0           graph  obo:CHEBI_38311  rdfs:subClassOf  obo:CHEBI_27933  _IRI        
1          0           graph  obo:CHEBI_38311  rdfs:subClassOf  obo:CHEBI_27171  _IRI        
1          0           graph  obo:CHEBI_38311  rdf:type         owl:Class        _IRI