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

Input: Consider Input: Aragon and Castile joined to form which country?

Output: aragon


Input: Consider Input: The plays 'The Barber of Seville' and 'Marriage of Figaro' were written by whom?

Output: the marriage of figaro


Input: Consider Input: In which country can you see the ruins of Carthage?


Output: carthage