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

Ex Input:
Who composed 'Eine Kleine Nachtmusik' in the 18th Century?

Ex Output:
eine kleine nachtmusik


Ex Input:
What is the second largest of the Balearic Islands ?

Ex Output:
balearic islands


Ex Input:
Which European capital city lies at the confluence of the rivers Danube and Sava?

Ex Output:

sava