Task: Question Generation
Input (English): Chopin's original publishers included Maurice Schlesinger and Camille Pleyel. His works soon began to appear in popular 19th-century piano anthologies. The first collected edition was by Breitkopf & Härtel (1878–1902). Among modern scholarly editions of Chopin's works are the version under the name of Paderewski published between 1937 and 1966 and the more recent Polish "National Edition", edited by Jan Ekier, both of which contain detailed explanations and discussions regarding choices and sources.
Output (English): Who edited the Polish "National Edition" of Chopin's works?