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

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

Example Input: Whitney Houston`s husband Bobby Brown was originally a member of which successful band?
Example Output: bobby brown

Example Input: Who served as the ninth Governor of Alaska from 2006 to 2009?
Example Output:
alaska