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Hélène Bouvier ( June 20 , 1905 , Paris – March 11 , 1978 , Paris ) was a French operatic mezzo-soprano , particularly associated with the French repertoire .
 Hélène Bouvier
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hélène Bouvier