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

Example Input: Which band had a hit with the song 'Brown Girl in the Ring'?
Example Output: brown girl in the ring

Example Input: What's missing: Magnum Force, The Enforcer, Sudden Impact, and The Dead Pool?
Example Output: sudden impact

Example Input: Which former Education (and Transport) Secretary is MP for Bolton West?
Example Output:
bolton west