instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Which 1981 film , directed by John Huston, starred footballers Bobby Moore, Pele and Osvaldo Ardiles?
answer:
osvaldo ardiles


question:
In which US state would you find the cities of Chesapeake, Roanoke and Fredericksburg?
answer:
fredericksburg


question:
Who is credited with inventing bifocals?
answer:

bifocals