What is the {Class IB flammable liquid} with the {MAX(maximum peak exposure limit)} whose {instance of} is {occupational carcinogen}  ?
Which flammable liquid carcinogen has the highest exposure limit?
select ?ent where { ?ent wdt:P31 wd:Q21009055 . ?ent wdt:P2406 ?obj . ?ent wdt:P31 wd:Q21074597 } ORDER BY DESC(?obj)LIMIT 5 
select ?ent where {
?ent <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q21009055>.

?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?ent .
?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2406>.
?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj1.

?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?ent .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P31> .
?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q21074597> .

}
ORDER BY DESC(?obj1)
LIMIT 5
Which combustible fluid carcinogen has the most noteworthy introduction constrain?