Complex sentence: Here the river divides into two branches, the Matau (northern), which flows past Kaitangata, and Koau (southern), both branches flow into the Pacific Ocean at Molyneux Bay.
Split into simpler sentences: Here the river divides into two branches, the Matau (northern), which flows past Kaitangata, and Koau (southern). Both branches flow into the Pacific Ocean at Molyneux Bay.