assertion  retraction  graph  subject          predicate        object                        datatype    annotation
1          0           graph  obo:CHEBI_83820  rdfs:label       non-proteinogenic amino acid  xsd:string  
1          0           graph  obo:CHEBI_83820  oio:id           CHEBI:83820                   xsd:string  
1          0           graph  obo:CHEBI_83820  rdfs:subClassOf  obo:CHEBI_33709               _IRI        
1          0           graph  obo:CHEBI_83820  rdf:type         owl:Class                     _IRI