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

Input: Consider Input: Ride of the Valkyries is the official quick march of which branch of the British Army?

Output: british army


Input: Consider Input: 'Bring It All Back' was the debut single for which group in 1999?

Output: bring it all back


Input: Consider Input: In what city is the Brandenburg Gate located?


Output: brandenburg