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

[EX Q]: Brothers Richard and Simon Mantell played which sport for England in the 2010 Commonwealth Games?
[EX A]: 2010 commonwealth games

[EX Q]: Who directed the 1988 film 'Beetle Juice'?
[EX A]: beetlejuice

[EX Q]: Which hero of several Arthur Conan Doyle stories was first introduced in the novel 'The Lost World' in 1912?
[EX A]:
the lost world