Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
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Question: 'Edward Lewis' and 'Vivian Ward' were the principal characters in which popular 1990 film?

Answer: edward lewis

Question: The 2002 Winter Olympics were held in which city?

Answer: 2002 winter olympics

Question: With which song did Swedish pop group Abba win the 1974 Eurovision Song Contest?

Answer:
abba