instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
In which city were the 1912 Olympic games held Oslo, Antwerp or Stockholm?
answer:
1912 summer olympics


question:
What's missing: Magnum Force, The Enforcer, Sudden Impact, and The Dead Pool?
answer:
sudden impact


question:
In the UK television series 'Doctor Who', which actor played the ninth Doctor?
answer:

ninth doctor