What is the {isotope of thallium} with the {MAX(atomic number)} ?
WHICH IS THE ISOLTOPE OF THALLIUM WITH TH MOST ATOMIC NUMBER
select ?ent where { ?ent wdt:P31 wd:Q28223 . ?ent wdt:P1086 ?obj } ORDER BY DESC(?obj)LIMIT 5 
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q28223>.
?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/P1086>.
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .}
ORDER BY DESC(?obj)
LIMIT 5
Which Thallium has highest atom number?