Complex sentence: Sungai Tujoh is located at the westernmost point in Brunei, in the Belait district, and lies across the border from Kampong Rentis in the Malaysian state of Sarawak.
Split into simpler sentences: Sungai Tujoh is located at the westernmost point in Brunei. It is located in the Belait district and lies across the border from Kampong Rentis in the Malaysian state of Sarawak.