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

Ex Input:
In 2011, Christian Bale won a Best Supporting Actor Oscar for his role as an assistant to his half-brother in which boxing related film?

Ex Output:
christian bale


Ex Input:
With which song did Swedish pop group Abba win the 1974 Eurovision Song Contest?

Ex Output:
abba


Ex Input:
After the Battle of Landriano, French monarch Franois I was forced to concede defeat in which war?

Ex Output:

battle of landriano