assertion  retraction  graph  subject          predicate        object                    datatype    annotation
1          0           graph  obo:CHEBI_25985  rdfs:label       phenylalanine derivative  xsd:string  
1          0           graph  obo:CHEBI_25985  oio:id           CHEBI:25985               xsd:string  
1          0           graph  obo:CHEBI_25985  rdfs:subClassOf  obo:CHEBI_83821           _IRI        
1          0           graph  obo:CHEBI_25985  rdf:type         owl:Class                 _IRI