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

Example Input: Which American screenwriter, producer, director, actor, author and editor, most productive in the 1950's, made Plan 9 From Outer Space, Glen or Glenda and Bride Of The Monster?
Example Output: screenwriter

Example Input: In 1867 who became the first Prime Minister of Canada?
Example Output: prime minister of canada

Example Input: Which of the following appeared in both the films `Magnolia` and `Boogie Nights` Mark Wahlberg, Julianne Moore or Tom Cruise?
Example Output:
magnolia