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

Example Input: The town of Anthony in which US state was known as 'The Leap Year Capital of the World'?
Example Output: united states

Example Input: Which of these was the title of Bobby Darin's first million selling single?
Example Output: bobby darin

Example Input: Who released the albums Sentimental Journey, Goodnight Vienna, Bad Boy, Old Wave and Vertical Man between 1970 and 1999?
Example Output:
vertical man