Complex sentence: The island is very densely populated with four main villages, each made up of sub-villages and total approximately 1500 inhabitants (2008), all on the west side of the 8 km by 600m long and thin island.
Split into simpler sentences: The island is very densely populated with four main villages, each made up of a number of sub-villages and total approximately 1500 inhabitants (2008). These are all on the west side of the 8 km by 600m long and thin island.