You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.

[EX Q]: Category: THIS "BUD"'S FOR YOU 
Clue: It's the practice of pairing swimmers, with each responsible for the other's safety
[EX A]: the buddy system

[EX Q]: Category: KEANU, ASHTON OR EINSTEIN 
Clue: Born in Beirut, Lebanon
[EX A]: keanu

[EX Q]: Category: I'M IN "SEVENTH" HEAVEN 
Clue: Folklorically, this descendant will have occult powers; it's also an Iron Maiden album
[EX A]:
seventh son of a seventh son