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

Example Input: What is the alcoholic ingredient of a Screwdriver cocktail?
Example Output: screwdriver

Example Input: Who was the first person to sign the American Declaration of Independence?
Example Output: united states declaration of independence

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