TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: What's missing: Magnum Force, The Enforcer, Sudden Impact, and The Dead Pool?

SOLUTION: sudden impact

PROBLEM: Who wrote the novels About A Boy, How To Be Good and High Fidelity?

SOLUTION: how to be good

PROBLEM: Charlotte Bronte wrote the novel Jane Eyre under which pen name?

SOLUTION:
charlotte bronte