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

Example Input: Which former Portuguese African Colony joined the British Commonwealth in 1995?
Example Output: commonwealth of nations

Example Input: Dora Maar au Chat and The Weeping Woman are both portraits by which artist of his lover?
Example Output: dora maar au chat

Example Input: In June 2010, Daniel Westling married Crown Princess Victoria of which country?
Example Output:
victoria, crown princess of sweden