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

Ex Input:
Which rank of the peerage is directly below a duke?

Ex Output:
duke


Ex Input:
Which English Leicester-born boxer fought Marvin Hagler in 1983 for the WBC and WBA World Middleweight titles and lost by a technical knockout in the sixth round?

Ex Output:
boxing


Ex Input:
Which hero of several Arthur Conan Doyle stories was first introduced in the novel 'The Lost World' in 1912?

Ex Output:

the lost world