What is the aircraft family with the highest time to altitude whose instance of is aircraft family?
select ?ent where { ?ent wdt:P31 wd:Q15056993 . ?ent wdt:P2362 ?obj . ?ent wdt:P31 wd:Q15056993 } ORDER BY DESC(?obj)LIMIT 5 
aircraft family: Q15056993 aircraft family: Q15056993