assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_26961  rdfs:label       thiophenes       xsd:string  
1          0           graph  obo:CHEBI_26961  oio:id           CHEBI:26961      xsd:string  
1          0           graph  obo:CHEBI_26961  rdfs:subClassOf  obo:CHEBI_38106  _IRI        
1          0           graph  obo:CHEBI_26961  rdf:type         owl:Class        _IRI