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: WORLD CAPITALS 
Clue: Belize City, a port, was Belize's capital until a 1961 hurricane; then the capital moved to this inland city
belmopan

Category: DRAMA 
Clue: Sula & Helena are robotesses in this Karel Capek play
"r.u.r."

Category: DANCING WITH THE STARS 
Clue: The Great Nebula in this constellation lies in the middle of a hunter's sword

orion