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

Input: Consider Input: In which Shakespeare play do the characters Ajax, Achilles and Ulysses appear?

Output: achilles


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

Output: castle cary


Input: Consider Input: What is the famous four-letter phrase uttered by Ronald Reagan in his speech in June, 1987 at Brandenburg Gate in West Berlin?


Output: ronald reagan