Sonata for Cello and Piano No. 2 in G Minor, Op. 5 No. 2 - 1a. Adagio sostenuto ed espressivo (g小调第二号大提琴与钢琴奏鸣曲，Op. 5 No. 2 - 第一乐章a 绵延且富有表情的柔板)