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:2018-06-22, Stock:RIO, The news for the past five days is as follows:
2018-06-15: nan
2018-06-18: NEWS1: BHP Board Approves South Flank Project to Replace Yandi.NEWS2: BHP Board Approves South Flank Project to Replace Yandi.
2018-06-19: nan
2018-06-20: NEWS1: BHP Sells Smallest Copper Mine in Chile for $320 Million.NEWS2: BHP Sells Smallest Copper Mine in Chile for $320 Million.
2018-06-21: nan

Answer: Rise