Complex sentence: In 1951, Sheraton bought the hotel renaming it the Sheraton-Cadillac, the hotel soon underwent massive renovations all public spaces, except the ballrooms and Italian Garden, were redone which included replacing the grand staircase with an escalator.
Split into simpler sentences: In 1951, Sheraton bought the hotel renaming it the Sheraton-Cadillac, the hotel soon underwent massive renovations. All public spaces, except the ballrooms and Italian Garden, were redone including replacing the grand staircase with an escalator.