Complex sentence: After Rosé the orchestra was conducted haphazardly by Sonia Vinogradovna, a Russian prisoner, but in January 1945 Auschwitz was dismantled by the Nazis and the orchestra was sent to Bergen-Belsen.
Split into simpler sentences: After Rosé the orchestra was conducted haphazardly by Sonia Vinogradovna, a Russian prisoner. In January 1945 Auschwitz was dismantled by the Nazis and the orchestra was sent to Bergen-Belsen.