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.

[Q]: Category: 1960s TV 
Clue: First aired on September 30, 1963, "Opie the Birdman" has become a classic episode of this sitcom
[A]: the andy griffith show


[Q]: Category: THE YOU-NIVERSE 
Clue: Containing 33 vertebrae, it's also known as the vertebral column
[A]: the spine


[Q]: Category: STARTS WITH "W" 
Clue: While skiers "think snow", river rafters think this
[A]:
white water