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

Example Input: Responsible for such films as 'Saving Private Ryan' and 'Gladiator', which film Production Company was founded by Steven Spielberg, Jeffrey Katzenberg and David Geffen in 1994?
Example Output: saving private ryan

Example Input: Laurence Olivier directed and starred in a 1944 film, which began in the Globe Theatre and then gradually shifted to a realistic evocation of the Battle of Agincourt, which was adapted from which one of Shakespeare's plays?
Example Output: battle of agincourt

Example Input: First shown in London in 1964, which musical is based on the legend of King Arthur?
Example Output:
king arthur