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.
Stanisław Narutowicz Stanisław Narutowicz (Lithuanian: "Stanislovas Narutavičius"    ) (September 2, 1862, Brewiki, Kovno Governorate – December 31, 1932, Kaunas, Lithuania) was a lawyer and politician, one of the twenty signatories of the Act of Independence of Lithuania and brother to the first president of Poland Gabriel Narutowicz. He was also the only Polish–Lithuanian member of the Taryba, the provisional Lithuanian parliament formed in the later stages of World War I.