Complex sentence: Since 1964, the island has been divided by the artificial Port Mansfield Channel, and as a result, the terms "North Padre Island" and "South Padre Island" are often used to refer to the separate portions of the island.
Split into simpler sentences: Since 1964, the island has been divided by the artificial Port Mansfield Channel. The terms "North Padre Island" and "South Padre Island" are often used to refer to the separated portions of the island.