Complex sentence: Porpoise Cay, is 275m long, 90m across and 3m high with a few low plants, lies 11 km West of Bird Islet in the centre of a shallow lagoon surrounded by a reef.
Split into simpler sentences: Porpoise Cay, is 275m long, 90m across and 3m high. It has a few low plants and lies 11 km West of Bird Islet in the centre of a shallow lagoon surrounded by a reef.