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

'Arthur Clennam', 'Jeremiah Flintwinch', and 'Edward Sparkler' are all characters in which Dickens' novel?
arthur clennam

What is the capital of the US state of Delaware?
delaware

Which Afro American super model, TV personality and singer hosts the TV show, America's Next Top Model and also has her own daytime TV chat show?

america's next top model