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

Example Input: The Briish Airways subsidiary BA Connect was sold to which other airline?
Example Output: airline

Example Input: Which English king was the son of Edward, the Black Prince?
Example Output: edward, the black prince

Example Input: In which Shakespeare play will you find 'Dull', 'Costard' and 'Moth'?
Example Output:
moth