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

Input: Consider Input: The bells were ringing for Chuck Berry when this song made it to No1. His first and only British No. 1. What song?

Output: chuck berry


Input: Consider Input: Albion is the oldest known name for which nation?

Output: albion


Input: Consider Input: The 2001 film 'A Beautiful Mind', starring Russell Crowe, told the true story of which brilliant but disturbed mathematician?


Output: a beautiful mind