assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_22693  rdfs:label       barbiturates     xsd:string  
1          0           graph  obo:CHEBI_22693  oio:id           CHEBI:22693      xsd:string  
1          0           graph  obo:CHEBI_22693  rdfs:subClassOf  obo:CHEBI_38337  _IRI        
1          0           graph  obo:CHEBI_22693  rdf:type         owl:Class        _IRI