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

Where on Prince Edward Island, Canada, is Anne of Green Gables located?
canada

What did Edwin Land invent because of his daughters' wish for instant and 'snappy' results?
edwin h. land

Who have the Conservatives chosen as their candidate to run for the 2016 London Mayor elections?

conservative party