Complex sentence: It has a population of just under 40,000 people, most of whom live in the western third of the region, in towns such as Port Hedland, Karratha, Wickham, Newman and Marble Bar.
Split into simpler sentences: It has a population of just under 40,000 people, most of whom live in the western third of the region. Most Pilbara residents live in the region's towns, which include Port Hedland, Karratha, Wickham, Newman and Marble Bar.