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

Example Input: Who had a hit album in 2010 with Can't Be Tamed?
Example Output: can't be tamed

Example Input: Who has taken over the TV role of Doctor Who, from actor David Tennant?
Example Output: doctor who

Example Input: What famous novel invented the terms thoughtcrime and doubleplusgood?
Example Output:
newspeak