assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_38337  rdfs:label       pyrimidone       xsd:string  
1          0           graph  obo:CHEBI_38337  oio:id           CHEBI:38337      xsd:string  
1          0           graph  obo:CHEBI_38337  rdfs:subClassOf  obo:CHEBI_39447  _IRI        
1          0           graph  obo:CHEBI_38337  rdf:type         owl:Class        _IRI