an Entity references as follows:
The Piano Concerto No. 1 in E minor, Op. 11, is a piano concerto written by Frédéric Chopin in 1830, when he was twenty years old. It was first performed on 11 October of that year, at the Teatr Narodowy (the National Theatre) in Warsaw, Poland, with the composer as soloist, during one of his "farewell" concerts before leaving Poland. The concerto is scored for solo piano, pairs of flutes, oboes, clarinets, and bassoons, four horns, two trumpets, tenor trombone, timpani and strings. A typical performance lasts about 40 minutes.