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

Ex Input:
What book was written by Alexandre Dumas about Edmond Dantes' imprisonment in the Chateau d'If?

Ex Output:
alexandre dumas

Ex Input:
What name is given to the murder of 7 people as part of a Prohibition Era conflict between the South Side Italian gang led by Al Capone and the North Side Irish gang led by Bugs Moran in Chicago, Illinois, in 1929?

Ex Output:
bugs moran

Ex Input:
Formula One world champions James Hunt, Nigel Mansell, Damon Hill, Lewis Hamilton and Jenson Button are all from which country?

Ex Output:
jenson button