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

Example Input: The Brooklyn Bridge crosses which river?
Example Output: brooklyn bridge

Example Input: Everything Changes, Beautiful World and Circus are all albums released by which British band?
Example Output: beautiful world

Example Input:  'Back to Bedlam' was the debut album for which British singer?
Example Output:
back to bedlam