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

Input: Consider Input: Which Beatles song was also recorded by Peter Sellers?

Output: the beatles

Input: Consider Input: Who composed 'Eine Kleine Nachtmusik' in the 18th Century?

Output: eine kleine nachtmusik

Input: Consider Input: Mark Twain's classic book, Adventures of Huckleberry Finn takes place along which US river?
Output: adventures of huckleberry finn