assertion  retraction  graph  subject          predicate        object                     datatype    annotation
1          0           graph  obo:CHEBI_33365  rdfs:label       platinum group metal atom  xsd:string  
1          0           graph  obo:CHEBI_33365  oio:id           CHEBI:33365                xsd:string  
1          0           graph  obo:CHEBI_33365  rdfs:subClassOf  obo:CHEBI_27081            _IRI        
1          0           graph  obo:CHEBI_33365  rdf:type         owl:Class                  _IRI