album_name: Beethoven: Piano Sonatas Nos. 27, 29 & 28
artists: 531a689ccbcd421cb6afcf5aa22ab1f2
artists: Ludwig van Beethoven
artists: ARTIST_ROLE_COMPOSER
artists: 022c7515de01475c8754ad8bf0ef4eba
artists: Charles Rosen
artists: ARTIST_ROLE_MAIN_ARTIST
name: Piano Sonata No. 29 in B-Flat Major, Op. 106 "Hammerklavier": I. Allegro