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

Ex Input:
Which composer was married to Clara Wieck from 1840 until his death in 1856?

Ex Output:
clara schumann


Ex Input:
In which war did the Sack of Badajoz takeplace?

Ex Output:
siege of badajoz


Ex Input:
Who hosted the '$64,000 Question' on British television?

Ex Output:

the $64,000 question