Original: During Richter's tenure, the orchestra gave the premieres of the 2nd and 3rd symphonies of Johannes Brahms, and the 8th symphony of Anton Bruckner.
Simplified: During the time Richter was conductor the orchestra gave the first performances of several very famous works, including Symphonies no 2 and 3 by Brahms and Symphony no 8 by Anton Bruckner.