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

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

A: charles dickens
****
Q: Grace Anna Goodhue was the wife of which US President?

A: grace coolidge
****
Q: Who was the first female US Attorney General?

A:
attorney general
****