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

Example Input: 'Edward Lewis' and 'Vivian Ward' were the principal characters in which popular 1990 film?
Example Output: edward lewis

Example Input: Brenda Mae Tarpley achieved fame under what name?
Example Output: brenda mae tarpley

Example Input: Which play by Arthur Miller opened on Broadway in New York in January 1953?
Example Output:
arthur miller