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

Q: Which singer/songwriter, who began releasing hit singles in 1958, has had 3 albums (The Definitive Collection, Waking Up Is Hard to Do & The Music of My Life) on Billboard's Top 200 Albums chart between 2007 & 2010?

A: the definitive collection
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Q: Ornette Coleman, Louis Armstrong and Charles Mingus are associated with what style of music?

A: charles mingus
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Q: Which artist painted Bubbles, which was used in the advertising for Pears soap?

A:
bubbles
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