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 Indian city is Eden Gardens, the second largest test cricket ground in the world?

Ex Output:
eden gardens


Ex Input:
Who played Lionel Hardcastle in the TV series 'As Time Goes By'?

Ex Output:
as time goes by


Ex Input:
The federal government of Australia moved to what new, purpose-built, planned, capital city in 1927?

Ex Output:

australia