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 simplicity, answers should be in all lower cased letters.

[EX Q]: Category: MARK ANTONYMS 
Clue: The traditional mark of someone who can't sign his name has this opposite in tic-tac-toe
[EX A]: o

[EX Q]: Category: LAW 
Clue: In Latin legal lingo it means "by the fact itself"
[EX A]: ipso facto

[EX Q]: Category: THE ISLANDS OF VANUATU 
Clue: This type of "cult" believes that a pilot named John Frum will arrive some day bearing a wealth of consumer goods
[EX A]:
a cargo cult