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: RIVERS 
Clue: The mouth of this 2315-mile-long river lies in the Mississippi River 17 miles above St. Louis
[EX A]: the missouri

[EX Q]: Category: COLLEGE SPORTS TEAM NICKNAMES 
Clue: Penn State
[EX A]: nittany lions

[EX Q]: Category: JEOPARDY PLATFORMS 
Clue: In 1975, the USS Kirk had to push helicopters off its deck as it helped people fleeing from this Asian capital
[EX A]:
saigon