Complex sentence: In Russia, Zhislin gave the first performance of Penderecki's Violin Concerto; composer and interpret formed a close relationship; together they have recorded all of Penderecki's works for violin and viola.
Split into simpler sentences: In Russia, Zhislin gave the first performance of Penderecki's Violin Concerto; composer and interpret formed a close relationship. Together they have recorded all of Penderecki's works for violin and viola.