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.

Category: PHOTOGRAPHERS 
Clue: In April 1875 the Library of Congress gained possession of his Civil War photographic plates for $25,000
mathew brady

Category: WORLD HISTORY 
Clue: He completed vols. 2 & 3 of Karl Marx's "Das Kapital"
friedrich engels

Category: JULIA ROBERTS FILM FEST 
Clue: It was viva Las Vegas for Julia, who played the Angie Dickinson role in the remake of this film

ocean\'s eleven