assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_39447  rdfs:label       pyrimidines      xsd:string  
1          0           graph  obo:CHEBI_39447  oio:id           CHEBI:39447      xsd:string  
1          0           graph  obo:CHEBI_39447  rdfs:subClassOf  obo:CHEBI_38313  _IRI        
1          0           graph  obo:CHEBI_39447  rdf:type         owl:Class        _IRI