assertion  retraction  graph  subject          predicate        object                       datatype    annotation
1          0           graph  obo:CHEBI_51958  rdfs:label       organic polycyclic compound  xsd:string  
1          0           graph  obo:CHEBI_51958  oio:id           CHEBI:51958                  xsd:string  
1          0           graph  obo:CHEBI_51958  rdfs:subClassOf  obo:CHEBI_33832              _IRI        
1          0           graph  obo:CHEBI_51958  rdfs:subClassOf  obo:CHEBI_33635              _IRI        
1          0           graph  obo:CHEBI_51958  rdf:type         owl:Class                    _IRI