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

Ex Input:
Who played 'Emma Peel' in the 1998 film 'The Avengers'?

Ex Output:
the avengers

Ex Input:
Carpo and Elara are moons of which planet?

Ex Output:
elara

Ex Input:
Which race run at Chantilly in June is often referred to as the French Derby?

Ex Output:
chantilly racecourse