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:2021-09-20, Stock:RIO, The news for the past five days is as follows:
2021-09-13: nan
2021-09-14: NEWS1: Rio Tinto Teams Up with Caterpillar for Zero-Emissions Autonomous Trucks.NEWS2: Mining stocks under pressure in London as industrial metals buckle.NEWS3: Fortescue sets up new mining pact with Aboriginal group.
2021-09-15: NEWS1: Miners Embracing Autonomous Trucks for a Carbon-Neutral Future.NEWS2: Is WisdomTree Global exU.S. Quality Dividend Growth ETF (DNL) a Strong ETF Right Now?.
2021-09-16: NEWS1: Jim Cramer's September stock market warning overlooks these 3 key sectors.NEWS2: Rio Tinto statement on penalty assessment.
2021-09-17: NEWS1: Iron-Ore Prices Keep Falling. These Mining Stocks Are Being Hit..NEWS2: Rio Tinto and WA Government's Pilbara vaccination blitz commences.

Answer: Decrease