assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_25699  rdfs:label       organic ion      xsd:string  
1          0           graph  obo:CHEBI_25699  oio:id           CHEBI:25699      xsd:string  
1          0           graph  obo:CHEBI_25699  rdfs:subClassOf  obo:CHEBI_50860  _IRI        
1          0           graph  obo:CHEBI_25699  rdfs:subClassOf  obo:CHEBI_24870  _IRI        
1          0           graph  obo:CHEBI_25699  rdf:type         owl:Class        _IRI