TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: In which US state are the Catskill Mountains?

SOLUTION: catskill mountains

PROBLEM: Who was in the films Zelig, Stardust Memories, and Broadway Danny Rose?

SOLUTION: broadway danny rose

PROBLEM: Becky Sharp is the heroine of which novel by William Makepeace Thackeray?

SOLUTION:
becky sharp