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

Ex Input:
In which city were the 2002 Winter Olympic Games held?

Ex Output:
2002 winter olympics


Ex Input:
What is the only nation state of the Commonwealth of Nations on the mainland of South America?

Ex Output:
commonwealth of nations


Ex Input:
Who played Bubble in the UK tv comedy series 'Absolutely Fabulous'?

Ex Output:

absolutely fabulous