You will be given a definition of a task first, then some input of the task.
In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

A movement in sonata form has three sections called : “ exposition ” , “ development ” and “ recapitulation ” .
Output:
Sonata form ( also " sonata-allegro form " or " first movement form " ) is a musical structure consisting of three main sections : an exposition , a development , and a recapitulation .