Complex sentence: Under Auschwitz I, Auschwitz II Birkenau, and Auschwitz III (Monowitz) the number was forty-eight (48), with thousands of prisoners each; their detailed description of purpose is provided by the Auschwitz-Birkenau State Museum.
Split into simpler sentences: Under Auschwitz I, Auschwitz II (Birkenau), and Auschwitz III (Monowitz) the number was forty-eight (48), with thousands of prisoners each. Their detailed description of purpose is provided by the Auschwitz-Birkenau State Museum.