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

Example Input: What famous song from the film Butch Cassidy and the Sundance Kid won an Oscar for best song?
Example Output: academy award for best original song

Example Input: In which wars did the battles of Towton and Barnet take place?
Example Output: battle of barnet

Example Input: What is the name of the Towers in which Doctor Who villain Kroagnon (The Great Architect) existed as a disembodied intelligence stored in a tank?
Example Output:
doctor who