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

Example Input: What country has an official residence called Blair House, kept for guests of the leader of the country?
Example Output: blair

Example Input: Which pop group consisted of Huw Bunford, Clan Caren, Dafydd Leuan, Guto Price and Gryff Rhuys?
Example Output: huw bunford

Example Input: What is the top prize at the Cannes Film Festival?
Example Output:
cannes film festival