Based on the news about the stock in the past five trading days, please predict the rise or fall of the stock in the next trading day. If the stock is predicted to rise in the next trading day, please output [Rise], if the stock is predicted to fall in the next trading day, please output [Decrease].

Date:2020-09-21, Stock:Unp, The news for the past five days is as follows:
2020-09-14: nan
2020-09-15: NEWS1: Union Pacific Celebrates 150 Years on New York Stock Exchange.NEWS2: Union Pacific Corporation Announces Expiration of Exchange Offers and Increase in Size of Exchange Offers Limit.NEWS3: 7 Infrastructure Stocks to Buy Ahead of Big Federal Spending.
2020-09-16: NEWS1: Is Now An Opportune Moment To Examine Union Pacific Corporation (NYSE:UNP)?.NEWS2: Union Pacific Is Chugging Along to Higher Ground.
2020-09-17: NEWS1: Weekly US Rail Traffic Falls On Holiday Comps.
2020-09-18: nan

Answer: Decrease