Complex sentence: The U.S. Virgin Islands is one of five inhabited insular areas of the United States, along with American Samoa, Guam, Northern Mariana Islands, and Puerto Rico comprising St. Croix, St. John, St. Thomas and Water Island.
Split into simpler sentences: The U.S. Virgin Islands is one of five inhabited insular areas of the United States, along with American Samoa, Guam, Northern Mariana Islands, and Puerto Rico. The territory is comprised of St. Croix, St. John, St. Thomas and Water Island.