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

Q: I which European city will you find 'Dam Square'?

A: dam square
****
Q: Who was the scheming wife of the Roman emperor Claudius?

A: claudius
****
Q: The cast of which Sylvester Stallone and Michael Caine film also included footballers Bobby Moore, John Wark and Ossie Ardilles?

A:
sylvester stallone
****