what is the class IIIA combustible liquid with the highest vapor pressure whose has part is chlorine?
select ?ent where { ?ent wdt:P31 wd:Q21009058 . ?ent wdt:P2119 ?obj . ?ent wdt:P527 wd:Q688 } ORDER BY DESC(?obj)LIMIT 5 
class iiia combustible liquid: Q21009058 chlorine: Q688