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

Example Input: In music, which band consists of Billy Gibbons, Dusty Hill and Frank Beard?
Example Output: frank beard

Example Input: Joseph Addison and Richard Steele founded (in 1711), and Boris Johnson edited, which British magazine?
Example Output: boris johnson

Example Input: Who won the 2013 Tour de France?
Example Output:
2013 tour de france