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

Example Input: The Battle of Poltava in 1709 was a victory by Peter the Great over which state?
Example Output: battle of poltava

Example Input: Where on Prince Edward Island, Canada, is Anne of Green Gables located?
Example Output: canada

Example Input: The Bourbon dynasty began to rule which country from 1700 and still do?
Example Output:
house of bourbon