assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_35715  rdfs:label       nitro compound   xsd:string  
1          0           graph  obo:CHEBI_35715  oio:id           CHEBI:35715      xsd:string  
1          0           graph  obo:CHEBI_35715  rdfs:subClassOf  obo:CHEBI_51143  _IRI        
1          0           graph  obo:CHEBI_35715  rdf:type         owl:Class        _IRI