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: THE STOCK MARKET 
Clue: In 2006 this Milwaukee-based co. announced its new stock symbol, "HOG", at a gathering in Sturgis, S.D.

Answer: harley-davidson


Question: Category: POLITICAL PHILOSOPHY 
Clue: The subtitle of this influential 1762 treatise is "Principes du droit politique" ("Principles of Political Right")

Answer: the social contract


Question: Category: FICTIONAL CHARACTERS 
Clue: A 1965 novel by this author introduced his alter ego, sci-fi writer Kilgore Trout

Answer:
kurt vonnegut, jr.