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:2019-12-05, Stock:RIO, The news for the past five days is as follows:
2019-11-27: NEWS1: Canada's First Quantum may team-up with Rio Tinto to develop Peru copper mine.NEWS2: REFILE-Canada's First Quantum may team-up with Rio Tinto to develop Peru copper mine.NEWS3: Rio Tinto Declares Force Majeure on Canadian Aluminum Sales.NEWS4: Rio Spending $4 Billion on Iron Ore Pipeline Amid China Demand.NEWS5: Rio Tinto and First Quantum in talks over Peru mine.NEWS6: Rio and First Quantum in talks over Peru mine.
2019-11-29: nan
2019-12-02: nan
2019-12-03: NEWS1: U.S. copper frenzy grows as Rio Tinto plans $1.5 bln Utah mine expansion.
2019-12-04: NEWS1: Buying Iron Ore Is Getting More Like Shopping on Amazon.NEWS2: 10 Bargain Blue Chips with Improving Growth Prospects.NEWS3: Violent Protests Shut Down Key Rio Tinto Mine in South Africa.NEWS4: Rio Tinto halts work at South African mine over escalating violence.

Answer: Decrease