instruction:
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.
question:
Category: LANDMARKS
Clue: In the 1879 Mathew Brady photo seen here, this structure was about 150 feet tall
answer:
washington monument

question:
Category: FICTIONAL CHARACTERS
Clue: A 1965 novel by this author introduced his alter ego, sci-fi writer Kilgore Trout
answer:
kurt vonnegut, jr.

question:
Category: 19th CENTURY INVENTIONS
Clue: Peter Roget's new device for performing mechanically the involution & evolution of numbers
answer:
the slide rule