Complex sentence: Lake Mahinerangi is a small hydroelectric lake formed by a dam on the Waipori River 35 kilometres to the west of Dunedin in New Zealand's South Island.
Split into simpler sentences: Lake Mahinerangi is a small lake formed when a dam was built on the Waipori River for hydroelectric generation. The lake is 35 kilometres to the west of Dunedin in New Zealand's South Island.