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

Input: Consider Input: Charon is a moon which orbits which body?

Output: charon


Input: Consider Input: What was the computer's name in 2001: A Space Odyssey?

Output: 2001: a space odyssey


Input: Consider Input: In which European city is Dam Square?


Output: dam square