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

Example Input: Alejandro Amaya, Carlos Arruza, Jaime Bravo and Carmelo Torres are famous Mexican?
Example Output: alejandro amaya

Example Input: The Trinity test site, outside of Alamogordo, NM, saw the first test of the atomic bomb on July 16, 1945. Headed by J. Robert Oppenheimer, what was the name of the project that developed the bomb?
Example Output: j. robert oppenheimer

Example Input: Brothers Barry, Robin, and Maurice (before his untimely death on Jan 12, 2003) Gibbs were better known as what band, who hit their peak during the disco era?
Example Output:
barry gibb