text: One of this man's early acquaintances took him to a local keyboard shop to develop his skills on fine instruments, and he studied under Antonio Salieri during his teenage years in Vienna.
full_question: One of this man's early acquaintances took him to a local keyboard shop to develop his skills on fine instruments, and he studied under Antonio Salieri during his teenage years in Vienna. This man composed the only extant major work for a rare guitar-like instrument called the arpeggione. His works are organized with the Deutsch catalog, symbolized by the letter 'D' and a number. He is well-known for his lieder, which include two great song cycles of Wilhelm Mueller's poems. Name this prolific German composer of Moments Musicaux, Winterreise, and the Unfinished Symphony.
first_sentence: One of this man's early acquaintances took him to a local keyboard shop to develop his skills on fine instruments, and he studied under Antonio Salieri during his teenage years in Vienna.