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

Example Input: 'Highway 61 Revisited' and 'Blood On The Tracks' were both albums released by which popular singer?
Example Output: highway 61 revisited

Example Input: Who is the only British Prime Minister to serve under 3 monarchs?
Example Output: prime minister of the united kingdom

Example Input: Who was defeated at the Battle of Falkirk in 1298 and later captured and executed in 1305?
Example Output:
battle of falkirk