Complex sentence: The Southern Provinces or Moroccan Sahara are the terms used by Morocco for Western Sahara, in reference Western Sahara, including all the parts that lie both to the west and to the east of the Moroccan military Berm in the area.
Split into simpler sentences: The Southern Provinces or Moroccan Sahara are the terms used by the Moroccan government for Western Sahara. These two official Moroccan denominations explicitly include all the parts of Western Sahara, that lie either to the west or to the east of the Moroccan military Berm in the area.