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

[Q]: Who succeeded Jon Pertwee as Doctor Who?
[A]: doctor who

[Q]: Where on Prince Edward Island, Canada, is Anne of Green Gables located?
[A]: canada

[Q]: By what name is musician David Robert Hayward-Jones better known?
[A]:
david robert hayward-jones