Detailed Instructions: 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: INFLUENTIAL 19th CENTURY THINKERS 
Clue: At the University of Bonn in 1836, he was wounded in a duel with a member of an aristocratic Prussian fraternity
A:
karl marx