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

Input: Consider Input: What name was given to the 1950-60s mainstream country music style of artists including Patsy Cline, Tammy Wynette, Jim Reeves, and Charlie Rich?

Output: charlie rich


Input: Consider Input: Which country has 6 time zones called Pacific, Mountain, Central, Eastern, Atlantic and Newfoundland?

Output: newfoundland and labrador


Input: Consider Input: What was the first ballet written by Tchaikovsky?


Output: ballet