Complex sentence: The Beverly Hills Hotel underwent significant renovation in the late forties, when the "porte cochere" was expanded and painted in stripes, and in 1947 Courtright opened the Crystal Room and the "Lanai" Restaurant, later called "The Coterie".
Split into simpler sentences: The Beverly Hills Hotel underwent significant renovation in the late forties when the "porte cochere" was expanded and painted in stripes. In 1947 Courtright opened the Crystal Room and the "Lanai" Restaurant, later called "The Coterie".