Who is a Polish politician that was also famous for performing Piano Concerto No. 4 by Anton Rubinstein?
Ignacy Jan Paderewski Ignacy Jan Paderewski, GBE (] ; 18 November [O.S. 6 November] 1860  – 29 June 1941) was a Polish pianist and composer, politician and spokesman for Polish independence. He was a favorite of concert audiences around the world. His musical fame opened access to diplomacy and the media.
Antoni Pająk Antoni Pająk (] ; July 31, 1893, Bestwina - November 25, 1965, London) was a Polish socialist (member of the Polish Socialist Party) politician, who served as Prime Minister of Poland in exile for nearly ten years (1955-1965).