Complex sentence: Arrigorriaga is located 7km south of Bilbao and is part of Bilbao's metropolitan area, it's official population at the 2010 census was 12,358 inhabitants living on a land area of 16.36 km² (6.3 sq mi).
Split into simpler sentences: Arrigorriaga is located 7 km south of Bilbao and is part of Bilbao's metropolitan area. Its official population at the 2010 census was 12,358 inhabitants living on a land area of 16.36 km² (6.3 sq mi).