Task: Text Categorization
Input (English): Ernest Bloch wrote two quintets for this instrument with a string quartet that have been performed by Piers Lane. This is the lead instrument in the only completed concerto by Edvard Grieg. All of the concerti written by Sergei Rachmaninoff are for this, and it is the lead instrument in his Rhapsody on a Theme of Paganini. Alexander Scriabin published ten sonatas for this instrument, several of which were performed by Vladimir Horowitz. This is also the lead instrument in Beethoven's Emperor Concerto, one of the many pieces famously played by Van Cliburn. Name this instrument that produces a sound when its strings are struck by a hammer following the pressing of one of its 88 keys.
Output (English): Fine Arts