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

[EX Q]: 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?
[EX A]: battle of agincourt

[EX Q]: Who has taken over the TV role of Doctor Who, from actor David Tennant?
[EX A]: doctor who

[EX Q]: Which Faulty Towers character was played by Ballard Berkeley?
[EX A]:
ballard berkeley