assertion  retraction  graph  subject          predicate        object                 datatype    annotation
1          0           graph  obo:CHEBI_37667  rdfs:label       sesquiterpene lactone  xsd:string  
1          0           graph  obo:CHEBI_37667  oio:id           CHEBI:37667            xsd:string  
1          0           graph  obo:CHEBI_37667  rdfs:subClassOf  obo:CHEBI_37668        _IRI        
1          0           graph  obo:CHEBI_37667  rdfs:subClassOf  obo:CHEBI_26658        _IRI        
1          0           graph  obo:CHEBI_37667  rdf:type         owl:Class              _IRI