Complex sentence: The headwaters of the river rise in the Durack range near Yulumbu then flow in a northerly direction along the range until the river merges with the Pentecost River near El Questro Station.
Split into simpler sentences: The headwaters of the river rise in the Durack range near Yulumbu. The river flows in a northerly direction along the range until it merges with the Pentecost River near El Questro Station.