Complex sentence: His wife Mirjam, identified as Jewish, was deported with him, before was sent via Ravensbrück to Auschwitz, where she was murdered in a gas chamber in May 1942.
Split into simpler sentences: His wife Mirjam, identified as Jewish, was deported with him. She was sent via Ravensbrück to Auschwitz where she was murdered in a gas chamber in May 1942.