generate questions: Back in Warsaw that year, Chopin heard Niccolò Paganini play the violin, and composed a set of variations, Souvenir de Paganini. It may have been this experience which encouraged him to commence writing his first Études, (1829–32), exploring the capacities of his own instrument. On 11 August, three weeks after completing his studies at the Warsaw Conservatory, he made his debut in Vienna. He gave two piano concerts and received many favourable reviews—in addition to some commenting (in Chopin's own words) that he was "too delicate for those accustomed to the piano-bashing of local artists". In one of these concerts, he premiered his Variations on Là ci darem la mano, Op. 2 (variations on an aria from Mozart's opera Don Giovanni) for piano and orchestra. He returned to Warsaw in September 1829, where he premiered his Piano Concerto No. 2 in F minor, Op. 21 on 17 March 1830.
What did Frédéric compose after hearing Niccolò Paganini perform on the violin? {sep_token} During what month did Frédéric make his first appearance in Vienna? {sep_token} How many piano concerts did Frédéric perform in Vienna during this time? {sep_token} On what date did Frédéric give his first performance of Piano Concerto No. 2 in F minor, Op. 21? {sep_token} What did Chopin compose after hearing Niccolo Paganini? {sep_token} Where did Chopin debut after completing his studies? {sep_token} What piece did Chopin debut after returning to Warsaw? {sep_token} When did Chopin return to Warsaw? {sep_token} Why did some critics say that Chopin was too delicate? {sep_token} Who did Chopin hear play violin in 1829 that prompted him to write a composisition? {sep_token} Where did Chopin make his debut after completing his education? {sep_token} How many public performances did Chopin do where he made his debut after completing his education? {sep_token} How many weeks after completing school was it before Chopin made his public debut? {sep_token}