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

[EX Q]: Court Philippe Chatrier, which has stands named after Jacques Toto Brugnon, Jean Borotra, Henri Cochet, and Ren Lacoste, is the main court of an international tennis venue in which city?
[EX A]: stade roland garros

[EX Q]: Charon is a moon which orbits which body?
[EX A]: charon

[EX Q]: What is the name of the village druid in the comic strip 'Asterix'?
[EX A]:
asterix