Original: It also premiered Schoenberg's first and second string quartets and participated in the premiere of Verklärte Nacht along with two members of the Vienna Philharmonic Orchestra: Franz Jelinek, viola, and Franz Schmidt, violoncello.
Simplified: It also gave the first performance of Schoenberg's first and second string quartets and the sextet Verklärte Nacht in which they were joined by two other members of the Vienna Philharmonic Orchestra: Franz Jelinek, viola, and Franz Schmidt, cello.