assertion  retraction  graph  subject          predicate        object               datatype    annotation
1          0           graph  obo:CHEBI_33661  rdfs:label       monocyclic compound  xsd:string  
1          0           graph  obo:CHEBI_33661  oio:id           CHEBI:33661          xsd:string  
1          0           graph  obo:CHEBI_33661  rdfs:subClassOf  obo:CHEBI_33595      _IRI        
1          0           graph  obo:CHEBI_33661  rdf:type         owl:Class            _IRI