Complex sentence: The areas of Uva Wellassa, Nuwarakalaviya were neglected jungle areas which had a predominant population of Muslims who disrupted time and again the smooth supply of salt and dry fish to the people in the Kandyan Kingdom.
Split into simpler sentences: The areas of Uva Wellassa and Nuwarakalaviya were neglected jungle areas which had a predominant population of Muslims. The inhabitants of these areas disrupted time and again the smooth supply of salt and dry fish to the people in the Kandyan Kingdom.