Complex sentence: Malaysia shares a land border with Indonesia on the island of Borneo where the Malaysian states of Sabah and Sarawak lie to the north of the border while tne Indonesian provinces of East Kalimantan and West Kalimantan lie to the south.
Split into simpler sentences: Malaysia shares a land border with Indonesia on the island of Borneo. The Malaysian states of Sabah and Sarawak lie to the north of the border while the Indonesian provinces of East Kalimantan and West Kalimantan lie to the south.