Complex sentence: The Tonle Sap, also known as the Great Lake in central Cambodia is the largest freshwater lake in Southeast Asia and one of the richest inland fishing grounds in the world.
Split into simpler sentences: The Tonle Sap, also known as the Great Lake in central Cambodia, is the heart of Cambodia's freshwater fisheries. It is the largest freshwater lake in Southeast Asia and one of the richest inland fishing grounds in the world.