Complex sentence: According to the narrative, Gondor was founded by brothers Isildur and Anárion, exiles from the downfallen island kingdom of Númenor, and along with Arnor in the north served as a last stronghold of the Men of the West.
Split into simpler sentences: According to the narrative, Gondor was founded by the brothers Isildur and Anárion, exiles from the downfallen island kingdom of Númenor. Along with Arnor in the north Gondor served as a last stronghold of the Men of the West.