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:2020-03-23, Stock:RIO, The news for the past five days is as follows:
2020-03-16: NEWS1: Oyu Tolgoi work slows due to Mongolia's coronavirus curbs -Rio Tinto.NEWS2: Rio Tinto provides update on Oyu Tolgoi project.NEWS3: Rio Tinto slows expansion of Oyu Tolgoi copper mine in Mongolia .
2020-03-17: nan
2020-03-18: NEWS1: Update on Rio Tinto Kennecott after SLC earthquake.
2020-03-19: nan
2020-03-20: NEWS1: Markets Now - Friday 20th March 2020.

Answer: Decrease