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She was best known for her appearances in the most prestigious 1950s cabarets , where she sang an elegant repertoire in a soprano noted for its silvery tone , perfect diction , intimacy , and meticulous attention to words .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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