assertion  retraction  graph  subject         predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_8069  rdfs:label       phenobarbital    xsd:string  
1          0           graph  obo:CHEBI_8069  oio:id           CHEBI:8069       xsd:string  
1          0           graph  obo:CHEBI_8069  rdfs:subClassOf  obo:CHEBI_22693  _IRI        
1          0           graph  obo:CHEBI_8069  rdf:type         owl:Class        _IRI