Original sentence: Leno has a contract for four years for the show
Edited sentence: " Leno has a contract for four years for the show.NBC executives called the decision "a transformational moment in the history of broadcasting" and "in effect, launching five shows", while an industry observer said that Leno, "in all my years, is the biggest risk a network has ever taken.NBC is the first network in decades to strip a show during weekday prime time hours