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: Which of these was the title of Bobby Darin's first million selling single?

Output: bobby darin

Input: Consider Input: The majority of the Amazon Rainforest is contained within which country?
Output: amazon