sentence: Pianists have to learn many things.
sentences_after: It is important to sit comfortably with a straight back so that hands can reach all the keys. The hands should be shaped like a ball so that the fingers are curved. They should be able to control the sound they make with the weight of the arm and fingers. Lots of practice is needed to become a good pianist. Playing the piano helps people to understand harmony because the piano can play chords.
concept_name: pianist
headings: Piano Playing the piano
categories: Piano