assertion  retraction  graph  subject          predicate        object               datatype    annotation
1          0           graph  obo:CHEBI_33597  rdfs:label       homocyclic compound  xsd:string  
1          0           graph  obo:CHEBI_33597  oio:id           CHEBI:33597          xsd:string  
1          0           graph  obo:CHEBI_33597  rdfs:subClassOf  obo:CHEBI_33595      _IRI        
1          0           graph  obo:CHEBI_33597  rdf:type         owl:Class            _IRI