Original sentence: Spain defends that the southernmost Exclusive Economic Zone border between Spain and Portugal should consist on an equidistant line drawn halfway between Madeira and the Canary Islands
Edited sentence: Spain defends that the sovereignty of the islands belongs to them and that the southernmost Exclusive Economic Zone border between Spain and Portugal should consist on an equidistant line drawn halfway between Madeira and the Canary Islands.There is a dispute on sovereignty of the islands between Portugal and Spain