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

Input: Consider Input: Which play and film was adapted from a story by Christopher Isherwood and later adapted as the musical and film Cabaret?

Output: cabaret


Input: Consider Input: What are Proxima Centauri, Sirius A, Pollux, Arcturus and Betelgeuse?

Output: arcturus


Input: Consider Input: Who played Doctor Watson in the 1959 Hammer Horror classic The Hound of The Baskervilles?


Output: the hound of the baskervilles