Question: Who is a Polish politician that was also famous for performing Piano Concerto No. 4 by Anton Rubinstein?
Sentence (from "Piano Concerto No. 4 (Rubinstein)"): The Piano Concerto No. 4 in D minor, Op. 70, by Anton Rubinstein is a Romantic concerto that was once highly esteemed and was in the repertoire of the Russian and Polish piano virtuosos Sergei Rachmaninoff and Ignacy Jan Paderewski.
Relevant evidence: Yes