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: MOVIE MOUNTAINS 
Clue: This peak is featured in the 1959 Disney film "Third Man on the Mountain", where it's called "The Citadel"
the matterhorn

Category: CONGRESS 
Clue: The word for this job comes from a fox-hunting term for someone who keeps the hunting dogs from straying
the whip

Category: WORLD DRAMA 
Clue: Sophocles, Euripides & Eugene O'Neill all wrote plays with this woman's name in their titles

electra