assertion  retraction  graph  subject          predicate        object                    datatype    annotation
1          0           graph  obo:CHEBI_33674  rdfs:label       s-block molecular entity  xsd:string  
1          0           graph  obo:CHEBI_33674  oio:id           CHEBI:33674               xsd:string  
1          0           graph  obo:CHEBI_33674  rdfs:subClassOf  obo:CHEBI_33579           _IRI        
1          0           graph  obo:CHEBI_33674  rdf:type         owl:Class                 _IRI