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: BRAZIL 
Clue: It got its name after a Spanish explorer reported being attacked by female warriors there
[EX A]: amazon river

[EX Q]: Category: FAMILIAR PHRASES 
Clue: Pool table piece you don't want to be "behind"
[EX A]: the 8 ball

[EX Q]: Category: WHATSITS, DOOHICKEYS, THINGAMABOBS 
Clue: To set up one of these in the Northern Hemisphere, point the gnomon on its face to the North Pole
[EX A]:
sundial