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

Example Input: What is the name of the US electric car manufacturer, founded in 2003, whose cars include the Model S and the Model X?
Example Output: tesla model s

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: What would an anemometer measure?
Example Output:
anemometer