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:2019-10-15, Stock:RIO, The news for the past five days is as follows:
2019-10-08: NEWS1: Vale Expects to Conclude Dam Burst Disbursements by 2022.
2019-10-09: nan
2019-10-10: NEWS1: Here is What Hedge Funds Think About Rio Tinto Group  (RIO).
2019-10-11: nan
2019-10-14: NEWS1: UPDATE 1-At least two dead in Guinea protests against change to constitution.NEWS2: European stocks slink back on warier view of U.S.-China, Brexit talks.NEWS3: Does Rio Tinto Group (LON:RIO) Have A Healthy Balance Sheet?.

Answer: Decrease