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

Input: Consider Input: Who was the only boxer to win a world title without ever having a manager?

Output: boxing


Input: Consider Input: The rivers Axe, Brue, Cary, Parrett, eta, are in which English county?

Output: castle cary


Input: Consider Input: Who produced the first Chinook helicopter in 1961?


Output: boeing ch-47 chinook