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: NONFICTION
Clue: This 1988 bestseller was subtitled "From the Big Bang to Black Holes"
[EX A]: a brief history of time

[EX Q]: Category: BEASTLY LITERATURE
Clue: Santiago, the old man in a Hemingway story, struggles mightily with this type of game fish
[EX A]: marlin

[EX Q]: Category: I WANT TO RIDE THAT!
Clue: Six Flags Great America unleashed a roller coaster named for this bat-tastic 2008 blockbuster
[EX A]:
the dark knight