assertion  retraction  graph  subject          predicate        object                    datatype    annotation
1          0           graph  obo:CHEBI_22928  rdfs:label       bromine molecular entity  xsd:string  
1          0           graph  obo:CHEBI_22928  oio:id           CHEBI:22928               xsd:string  
1          0           graph  obo:CHEBI_22928  rdfs:subClassOf  obo:CHEBI_24471           _IRI        
1          0           graph  obo:CHEBI_22928  rdf:type         owl:Class                 _IRI