assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_22712  rdfs:label       benzenes         xsd:string  
1          0           graph  obo:CHEBI_22712  oio:id           CHEBI:22712      xsd:string  
1          0           graph  obo:CHEBI_22712  rdfs:subClassOf  obo:CHEBI_33836  _IRI        
1          0           graph  obo:CHEBI_22712  rdf:type         owl:Class        _IRI