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

[Q]: Which English comedian has joined Amanda Holden as one of the judges on the current series of 'Britain's Got Talent'?
[A]: britain's got talent


[Q]: What is the name of the main thoroughfare in Barcelona, which runs from the Placa de Catalunya to the sea?
[A]: barcelona


[Q]: Who wrote the novel Barchester Towers?
[A]:
barchester towers