Complex sentence: Emir Nesib (Antonio Banderas), Sultan of Hobeica, and Sultan Amar (Mark Strong) of Salmaah have been in a border war over a vast barren strip they call "The Yellow Belt".
Split into simpler sentences: Emir Nesib (Antonio Banderas), Sultan of Hobeica and Sultan Amar (Mark Strong) of Salmaah have a dispute with their border. Both have been fighting war for a vast barren land they call "The Yellow Belt".