Original: MÃ rk began his studies with Frans Helmerson at 17 at the renowned Edsberg Music Institute . An admirer of Mstislav Rostropovich and the Russian school of cello , MÃ rk went on to study with the Russian cellist Natalia Shakhovskaya .
Simplified: When he was 17 MÃ rk studied with Frans Helmerson , then Heinrich Schiff and the Russian cellist Natalia Schakowskaya .