assertion  retraction  graph  subject          predicate        object                   datatype    annotation
1          0           graph  obo:CHEBI_35274  rdfs:label       ammonium ion derivative  xsd:string  
1          0           graph  obo:CHEBI_35274  oio:id           CHEBI:35274              xsd:string  
1          0           graph  obo:CHEBI_35274  rdfs:subClassOf  obo:CHEBI_51143          _IRI        
1          0           graph  obo:CHEBI_35274  rdfs:subClassOf  obo:CHEBI_33702          _IRI        
1          0           graph  obo:CHEBI_35274  rdf:type         owl:Class                _IRI