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

Ex Input:
On November 22, 1986, which boxer became the youngest WBC Heavyweight champion, at age 20 years, 4 months, when he scored a TKO over Trevor Berbick in the second round?

Ex Output:
boxing


Ex Input:
Bound for Glory is the 1943 autobiography of which singer-songwriter?

Ex Output:
bound for glory


Ex Input:
Which Dickens' novel features Captain Cuttle, Mr Toots and Carker?

Ex Output:

charles dickens