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

Ex Input:
Beaune, Nuits St George and Chambertin are wines from which French wine region?

Ex Output:
beaune


Ex Input:
In which US state would you find the cities of Chesapeake, Roanoke and Fredericksburg?

Ex Output:
fredericksburg


Ex Input:
Who played scientist Barnes Wallis in the film 'The Dambusters'?

Ex Output:

the dam busters