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

Ex Input:
Who is the BBC's political editor?

Ex Output:
bbc

Ex Input:
In which US state are the Catskill Mountains?

Ex Output:
catskill mountains

Ex Input:
Name the actress, she died in August 2002, who played the part of 'Madame Edith Artois' in the TV series 'Allo, Allo'?

Ex Output:
edith artois