assertion  retraction  graph  subject          predicate        object                               datatype    annotation
1          0           graph  obo:CHEBI_83811  rdfs:label       proteinogenic amino acid derivative  xsd:string  
1          0           graph  obo:CHEBI_83811  oio:id           CHEBI:83811                          xsd:string  
1          0           graph  obo:CHEBI_83811  rdfs:subClassOf  obo:CHEBI_83821                      _IRI        
1          0           graph  obo:CHEBI_83811  rdf:type         owl:Class                            _IRI