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

Input: Consider Input: In which Shakespeare play do the characters Ajax, Achilles and Ulysses appear?

Output: achilles


Input: Consider Input: What was Casanova's occupation at the time of is death?

Output: giacomo casanova


Input: Consider Input: Which popular Doctor Who villains, it was revealed in 2011, are to be given 'a rest' by scriptwriters?


Output: doctor who