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

Example Input: What was the title of Britney Spears' second album (and the single that was released from it)?
Example Output: britney spears

Example Input: In which 1960's TV series did Clarence the cross-eyed lion appear?
Example Output: clarence, the cross-eyed lion

Example Input: Frank Sinatra, Dean Martin, and Sammy Davis Junior were among several entertainers given what collective nickname?
Example Output:
sammy davis jr.