Piano Concerto No. 2 in B-Flat Major, K. 39 - Mozart: Piano Concerto No. 2 in B-Flat Major, K. 39: I. Allegro spiritoso (Piano Concerto No.2 in B flat, K.39: Ｍｏｚａｒｔ：　１．　Ａｌｌｅｇｒｏ　ｓｐｉｒｉｔｏｓｏ　［Ｐｉａｎｏ　Ｃｏｎｃｅｒｔｏ　Ｎｏ．２　ｉｎ　Ｂ　ｆｌａｔ，　Ｋ．３９］|Piano Concerto No.2 in B flat, K.39: Mozart: 1. Allegro spiritoso [Piano Concerto No.2 in B flat, K.39])