find the work of fiction that is avatar: legend of korra set in and is a part of fictional universes avatar: the last airbender.
(AND fictional_universe.work_of_fiction (AND (JOIN fictional_universe.work_of_fiction.part_of_these_fictional_universes m.0hzzr48) (JOIN (R fictional_universe.fictional_universe.works_set_here) m.0hzzmkn)))