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

Example Input: What was the title of the first feature film made in Cinemascope?
Example Output: cinemascope

Example Input: Aaron Copeland wrote a ballet about which American folk hero?
Example Output: aaron copeland

Example Input: In which German city was Beethoven born?
Example Output:
ludwig van beethoven