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The popular soprano and flute duet cadenza was composed in 1888 by Mathilde Marchesi for her student Nellie Melba 's performance of the role , requiring ten weeks of rehearsal for the new addition and causing a critical reevaluation and surge of new interest in the opera .
 Mathilde Marchesi, Nellie Melba
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 Mathilde Marchesi, Nellie Melba