assertion  retraction  graph  subject          predicate        object                      datatype    annotation
1          0           graph  obo:CHEBI_26217  rdfs:label       potassium molecular entity  xsd:string  
1          0           graph  obo:CHEBI_26217  oio:id           CHEBI:26217                 xsd:string  
1          0           graph  obo:CHEBI_26217  rdfs:subClassOf  obo:CHEBI_33296             _IRI        
1          0           graph  obo:CHEBI_26217  rdf:type         owl:Class                   _IRI