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:2021-04-15, Stock:Unp, The news for the past five days is as follows:
2021-04-08: nan
2021-04-09: nan
2021-04-12: NEWS1: Vltava Fund Took Profits in Union Pacific (UNP) and Invested it in more Attractive Companies.NEWS2: Union Pacific Corporation Announces First Quarter 2021 Earnings Release Date.
2021-04-13: NEWS1: CVR Partners, LP -- Moody's stabilizes CVR Partners' outlook, affirms ratings.NEWS2: Did You Participate In Any Of Union Pacific's (NYSE:UNP) Fantastic 208% Return ?.NEWS3: Zacks Industry Outlook Highlights: Union Pacific Corp, Norfolk Southern Corp, Canadian Pacific Railway and more.
2021-04-14: nan

Answer: Rise