assertion  retraction  graph  subject          predicate        object             datatype    annotation
1          0           graph  obo:CHEBI_33702  rdfs:label       polyatomic cation  xsd:string  
1          0           graph  obo:CHEBI_33702  oio:id           CHEBI:33702        xsd:string  
1          0           graph  obo:CHEBI_33702  rdfs:subClassOf  obo:CHEBI_36916    _IRI        
1          0           graph  obo:CHEBI_33702  rdfs:subClassOf  obo:CHEBI_36358    _IRI        
1          0           graph  obo:CHEBI_33702  rdf:type         owl:Class          _IRI