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

Ex Input:
What did Edwin Land invent because of his daughters' wish for instant and 'snappy' results?

Ex Output:
edwin h. land


Ex Input:
Which exponent of Brit Art created works involving a bed, a tent and a beach hut?

Ex Output:
young british artists


Ex Input:
Who wrote the play Oedipus Rex, Antigone and Electra?

Ex Output:

electra