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:
Who painted The Card Players, at Feb 2012 the most expensive artwork in the world?

Ex Output:
the card players


Ex Input:
Which 20th century artist's works include 'Christ Of St. John Of The Cross' and 'Metamorphosis Of Narcissus'?

Ex Output:

christ of saint john of the cross