What is the Australian Classification category with the highest minimum age whose instance of is 15 rating?
select ?ent where { ?ent wdt:P31 wd:Q26708074 . ?ent wdt:P2899 ?obj . ?ent wdt:P31 wd:Q47542366 } ORDER BY DESC(?obj)LIMIT 5 
australian classification category: Q26708074 15 rating: Q47542366