What is the weapon model with the maximum rate of fire whose subclass of is naval artillery?
select ?ent where { ?ent wdt:P31 wd:Q15142894 . ?ent wdt:P3792 ?obj . ?ent wdt:P279 wd:Q511450 } ORDER BY DESC(?obj)LIMIT 5 
weapon model: Q15142894 naval artillery: Q511450