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

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

Example Input: Who composed 'Eine Kleine Nachtmusik' in the 18th Century?
Example Output: eine kleine nachtmusik

Example Input: Which Shakespeare play has the characters Deiphobus and Alexander?
Example Output:
deiphobus