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: THE 76th ACADEMY AWARDS 
Clue: He took home the little bald guy for the first time in 4 tries, winning Best Actor for "Mystic River"
sean penn

Category: ANTARCTICA 
Clue: A research base at the South Pole is co-named for these 2 explorers, the first 2 to reach it
amundsen

Category: HOTELS 
Clue: We'll tell you "diplomatically" that this L.A. hotel was the home of the Coconut Grove nightclub

the ambassador hotel