Complex sentence: Dutch Antilleans are the inhabitants and their descendents of the former Netherlands Antilles, which include Aruba, Bonaire, Curaçao, Saba, Sint Maarten and Sint Eustatius.
Split into simpler sentences: Dutch Antilleans are the inhabitants of the former Netherlands Antilles and their descendants. These are the people of Aruba, Bonaire, Curaçao, Saba, Sint Maarten and Sint Eustatius.