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: Cassandra, Grizabella and Skimbleshanks are all characters in which Andrew Lloyd Webber musical?

Answer: andrew lloyd webber


Question: What was the computer's name in 2001: A Space Odyssey?

Answer: 2001: a space odyssey


Question: Which American situation comedy created by David Crane and Marta Kauffman premiered on NBC on September 22, 1994?

Answer:
nbc