What is the {isotope of bismuth} with the {MAX(half-life)} ?
Which isotope of bismuth has the longest half-life?
select ?ent where { ?ent wdt:P31 wd:Q1372372 . ?ent wdt:P2114 ?obj } ORDER BY DESC(?obj)LIMIT 5 
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q1372372>.
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?ent .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2114>.
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .}
ORDER BY DESC(?obj)
LIMIT 5
Which bismuth isotope has the longest rate of decay?