assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_38831  rdfs:label       2-benzofurans    xsd:string  
1          0           graph  obo:CHEBI_38831  oio:id           CHEBI:38831      xsd:string  
1          0           graph  obo:CHEBI_38831  rdfs:subClassOf  obo:CHEBI_35259  _IRI        
1          0           graph  obo:CHEBI_38831  rdf:type         owl:Class        _IRI