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

Ex Input:
Chris Difford and Glenn Tilbrook founded which band in 1974?

Ex Output:
chris difford

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

Ex Output:
edwin h. land

Ex Input:
The 1970's 'Cod Wars' were over fishing rights between the UK and which other country?

Ex Output:
cod wars