Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Q: Which late 17th and early 18th century British architect designed Brighton Pavilion, Marble Arch, and the plan for London's Regents Park?

A: royal pavilion
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Q: Who composed 'Belshazzar's Feast' cantata?

A: belshazzar's feast
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Q: What singer was managed by Colonel Tom Parker?

A:
colonel tom parker
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