Complex sentence: It is about 35 km (22 mi) long, 23 km (14 mi) wide and 500 sq km. Its central part is occupied by M'Bamou or Bamu Island (180 sq km), which is Republic of the Congo territory.
Split into simpler sentences: It is about 35 km (22 mi) long and 23 km (14 mi) wide. The area of the Pool is about 500 sq km and the central part is occupied by M'Bamou or Bamu Island (180 sq km), which is Republic of the Congo territory.