sentences:  Both Branscombe and Kalkavage have suggested that Mozart's arrangement of keys embodies a variety of sonata form, with the standard elements of exposition, development, and recapitulation.Thus, in the first two quatrains the music sets forth the tonic key and moves to the dominant (exposition); the exploration of a variety of keys in the first tercet forms a development; and the reassertion of the tonic in the second tercet forms a recapitulation.Branscombe calls the latter a "vestigial recapitulation", since only some of the material of the exposition (in particular, not the opening) is repeated there.