which aircraft family has the lowest highest glide ration whose instance of is aircraft family?
select ?ent where { ?ent wdt:P31 wd:Q15056993 . ?ent wdt:P1470 ?obj . ?ent wdt:P31 wd:Q15056993} ORDER BY ASC(?obj)LIMIT 5 
aircraft family: Q15056993 aircraft family: Q15056993