Complex sentence: The kotte king Vijayabahu VII's three sons mutinied and killed their father dividing the kingdom among themselves giving rise to three minor kingdoms, Kotte Sitawaka and Principality of Raigama.
Split into simpler sentences: The Kotte king Vijayabahu VII's three sons mutinied and killed their father dividing the kingdom among themselves. This gave rise to three minor kingdoms, Kotte, Sitawaka and Principality of Raigama.