Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Example Input: Ride of the Valkyries is the official quick march of which branch of the British Army?
Example Output: british army

Example Input: Which jockey rode Red Alligator to victory in the 1968 Grand National?
Example Output: red alligator

Example Input: Which sign of the zodiac comes between Scorpio and Capricorn?
Example Output:
capricorn