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

Ex Input:
What was the name of the Prime Minister of Egypt who was assassinated in 1910?

Ex Output:
egypt


Ex Input:
Mr Barkis, Edward Murdstone and Tommy Traddles are all characters in which Charles Dickens novel?

Ex Output:
charles dickens


Ex Input:
Where are the Carnac Stones, the largest megalithic site of its kind anywhere, containing over 3,000 huge rocks erected by pre-Celtic people c.4,000-3,300BC?

Ex Output:

carnac