assertion  retraction  graph  subject          predicate        object                 datatype    annotation
1          0           graph  obo:CHEBI_83821  rdfs:label       amino acid derivative  xsd:string  
1          0           graph  obo:CHEBI_83821  oio:id           CHEBI:83821            xsd:string  
1          0           graph  obo:CHEBI_83821  rdfs:subClassOf  obo:CHEBI_35352        _IRI        
1          0           graph  obo:CHEBI_83821  rdf:type         owl:Class              _IRI