Complex sentence: The concentration camp where she died is a now a French government historical site and a plaque to Andrée Borrel and the three women who died with her is part of the Deportation Memorial on the site.
Split into simpler sentences: The concentration camp where she died is a now a French government historical site. A plaque to Andrée Borrel and the three women who died with her is part of the Deportation Memorial on the site.