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

Input: Consider Input: Aldebaran is the brightest star in which constellation?

Output: aldebaran


Input: Consider Input: Which team lost the 2009 Superbowl to the Pittsburgh Steelers?

Output: super bowl xliii


Input: Consider Input: In Greek mythology, who was the son of King Atreus of Mycenae and Queen Aerope, murdered by his wife Clytemnestra on his return home from the Trojan War?


Output: aerope