Simplify the following text for a Grade 9 native English-speaking person.
Original: Leopold Damrosch , Franz Liszt 's former concertmaster at Weimar , served as conductor of the Philharmonic for the 1876-1877 season .
Simplified: Leopold Damrosch , who had been Franz Liszt 's concertmaster at Weimar , was the orchestraâ s conductor for the 1876-1877 season .