assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_26658  rdfs:label       sesquiterpenoid  xsd:string  
1          0           graph  obo:CHEBI_26658  oio:id           CHEBI:26658      xsd:string  
1          0           graph  obo:CHEBI_26658  rdfs:subClassOf  obo:CHEBI_26873  _IRI        
1          0           graph  obo:CHEBI_26658  rdf:type         owl:Class        _IRI