assertion  retraction  graph  subject          predicate        object                   datatype    annotation
1          0           graph  obo:CHEBI_35352  rdfs:label       organonitrogen compound  xsd:string  
1          0           graph  obo:CHEBI_35352  oio:id           CHEBI:35352              xsd:string  
1          0           graph  obo:CHEBI_35352  rdfs:subClassOf  obo:CHEBI_51143          _IRI        
1          0           graph  obo:CHEBI_35352  rdfs:subClassOf  obo:CHEBI_33285          _IRI        
1          0           graph  obo:CHEBI_35352  rdf:type         owl:Class                _IRI