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

Ex Input:
The plays 'The Barber of Seville' and 'Marriage of Figaro' were written by whom?

Ex Output:
the marriage of figaro


Ex Input:
Which composer's oratorios include 'The Kingdom' and 'The Dream of Gerontius'?

Ex Output:
the dream of gerontius


Ex Input:
Who in the summer of 2012 resigned as CEO of Barclays?

Ex Output:

barclays