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

Example Input: Who married the woman who was to become Queen Beatrix of the Netherlands, on 10 March 1966?
Example Output: beatrix

Example Input: What was Casanova's occupation at the time of is death?
Example Output: giacomo casanova

Example Input: What are the international registration letters of a vehicle from Algeria?
Example Output:
algeria