Complex sentence: In the extreme north there was the little sovereign Principality of Bidache, with an area of 1,284 km 2 and a decreasing population of 44,450 (in 1901), 25,356 (in 1990).
Split into simpler sentences: In the extreme north there was the little sovereign Principality of Bidache. Its extent is of 1,284 km 2, and has a decreasing population of 44,450 (in 1901), 25,356 (in 1990).