Give the name of the most memory capacity smartphone by the Android Nougat operating system?
select ?ent where { ?ent wdt:P31 wd:Q19723451 . ?ent wdt:P2928 ?obj . ?ent wdt:P306 wd:Q22274379 } ORDER BY DESC(?obj)LIMIT 5 
smartphone model: Q19723451 android nougat: Q22274379