assertion  retraction  graph  subject         predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_8107  rdfs:label       phenytoin        xsd:string  
1          0           graph  obo:CHEBI_8107  oio:id           CHEBI:8107       xsd:string  
1          0           graph  obo:CHEBI_8107  rdfs:subClassOf  obo:CHEBI_24628  _IRI        
1          0           graph  obo:CHEBI_8107  rdf:type         owl:Class        _IRI