Complex sentence: Madritsch's Jews were sent to a slave labor camp in Silesia, attached to a synthetic oil factory, and were put to work building new workshops for the SS. Madritsch undertook this construction job so that his workers would be kept alive.
Split into simpler sentences: Madritsch's Jews were sent to a slave labor camp in Silesia, attached to a synthetic oil factory. They were put to work building new workshops for the SS. Madritsch undertook this construction job so that his workers would be kept alive.