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

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

Ex Output:
abba


Ex Input:
Who was the only British medal winner at the 2010 Winter Olympics?

Ex Output:
2010 winter olympics


Ex Input:
The Battle of Hamel took place in which country during World War I?

Ex Output:

battle of hamel