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

[EX Q]: Who played Captain Jean-Luc Picard in the television series 'Star-Trek: The Next Generation'?
[EX A]: jean-luc picard

[EX Q]: Which popular animated characters, first seen in 1996 include many different characters including ones called Ash Ketchum, Tracy Sketchit and Gar Oak?
[EX A]: tracy

[EX Q]: The Jagger-Richard song 'As Tears Go By' was the first hit for whom?
[EX A]:
as tears go by