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

Example Input: Which 1970s musical film starred Angela Lansbury as a trainee witch?
Example Output: angela lansbury

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:  'The Dream of Gerontius' is the 1900 work of which English composer?
Example Output:
the dream of gerontius