sentences:  The distinctive neon lighting, that in the 1960s had had Venturi et al.talking of Vegas as a city of signs, had been replaced by giant television screens, which Venturi bemoaned.In their original book, and in the later 1977 revised edition, they had focussed upon characterizing Vegas in terms of how most if not all built objects in the (then) city in one way or another functioned as signage.