instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Which of North America's Great Lakes has the same name as a province of Canada?
answer:
canada

question:
In which country are the Angel Falls, or Kerepakupai Ven?
answer:
angel falls

question:
Which American TV drama centres around the offices of Sterling Cooper Advertising Agency?
answer:
guy walks into an advertising agency