qnli question: The Warsaw Chopin Society holds the Grand prix du disque de F. Chopin how often? sentence: On the occasion of the composer's bicentenary, the critics of The New York Times recommended performances by the following contemporary pianists (among many others): Martha Argerich, Vladimir Ashkenazy, Emanuel Ax, Evgeny Kissin, Murray Perahia, Maurizio Pollini and Krystian Zimerman.