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

Example Input: Pirate Edward Teach was better known by what nickname?
Example Output: edward teach

Example Input: Which British composer wrote the music used as the theme for Desert Island Discs He also wrote the Dambusters march and the Knightsbridge march.?
Example Output: the dam busters

Example Input: Which was the first X-rated film to have won the Oscar for Best Picture?
Example Output:
academy award for best picture