Complex sentence: The Dhahran residential camp is a short distance west of downtown Al Khobar, the closest Saudi town to Dhahran, and its traditional shopping center, and about 15 km south of Dammam, both older Saudi port cities on the coast of the Persian Gulf.
Split into simpler sentences: The Dhahran residential camp is a short distance west of downtown Al Khobar, the closest Saudi town to Dhahran, and its traditional shopping center. The camp is about 15 km south of Dammam, both older Saudi port cities on the coast of the Persian Gulf.