Complex sentence: The Fortress of Miolans was located in the territory of Savoy in a remote area between Italy and France from which the Marquis de Sade staged a jailbreak with two companions; his valet Latour, and Baron de l'Alee.
Split into simpler sentences: The Fortress of Miolans was located in the territory of Savoy in a remote area between Italy and France. A noted prisoner, the Marquis de Sade staged a jailbreak with two companions, his valet, Latour, and Baron de l'Alee.