Original sentence: Spain in its current boundaries formed out of a number of predecessor kingdoms in the late 15th century as a result of the Reconquista and the War of the Castilian Succession but it remains divided into a number of sub-regionalities
Edited sentence: Spain in its current boundaries formed out of a number of predecessor kingdoms in the late 15th century as a result of the Reconquista and the War of the Castilian Succession but it remains divided into a number of sub-nationalities