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

[EX Q]: What's missing: Magnum Force, The Enforcer, Sudden Impact, and The Dead Pool?
[EX A]: sudden impact

[EX Q]: Which film actor (1895-1926) is known for his films The Four Horsemen, The Sheik and Blood And Sand?
[EX A]: blood and sand

[EX Q]: Who painted Dedham Vale and The Valley Farm?
[EX A]:
dedham vale