TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Everything Changes, Beautiful World and Circus are all albums released by which British band?

SOLUTION: beautiful world

PROBLEM: Which current Broadway musical has a Japanese therapist character called Christmas Eve?

SOLUTION: christmas eve

PROBLEM: What mountain system in the USA stretches over 1500 miles south to Alabama, through which pass the Hudson and Mohawk Valleys?

SOLUTION:
alabama