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

[EX Q]: In which country did the dance The Czardas originate?
[EX A]: csardas

[EX Q]: Alejandro Amaya, Carlos Arruza, Jaime Bravo and Carmelo Torres are famous Mexican?
[EX A]: alejandro amaya

[EX Q]: How are the duo comprising Marc Almond and David Ball known?
[EX A]:
david ball