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:2019-05-28, Stock:UNH, The news for the past five days is as follows:
2019-05-20: NEWS1: Cramer: Health care stocks are rising on hopes Biden will snag the 2020 Democratic nomination.NEWS2: Jim Cramer: With Biden the Democratic Favorite, These Stocks Are Front-Runners.NEWS3: Cramer: Health care stocks are rising on hopes Biden will snag the 2020 Democratic nomination.NEWS4: Cramer: Health care stocks are rising on hopes Biden will snag the 2020 Democratic nomination.NEWS5: Chip Stocks Sink Nasdaq Amid Huawei Drama.NEWS6: Chip Stocks Sink Nasdaq Amid Huawei Drama.NEWS7: Market Close Report: NASDAQ Composite index closes at 7,702.38 down -113.90 points.NEWS8: Market Close Report: NASDAQ Composite index closes at 7,702.38 down -113.90 points.NEWS9: Dow Movers: AAPL, VZ.NEWS10: Dow Movers: AAPL, VZ.
2019-05-21: NEWS1: The World's Top 10 Health Care Companies (UNH, MDT).NEWS2: UnitedHealthcare Awards $1 Million Grant to Jordan Valley Community Health Center to Expand Use of Community Health Workers.NEWS3: Health care stocks rise on hopes Biden will snag 2020 Democratic nomination: Cramer.NEWS4: UnitedHealthcare Community Plan Donates Drug Disposal Kits to Local Community Groups to Help People Safely Dispose of Unused Opioids.NEWS5: 3 Managed Care Providers Are Finally Looking Promising on the Charts.NEWS6: Our Ultimate Stock-Pickers' Top 10 High-Conviction and New-Money Purchases.
2019-05-22: NEWS1: UnitedHealth Group (UNH) Stock Moves -0.24%: What You Should Know.NEWS2: UnitedHealthcare Helps Make it Easier for People to Stay Fit and Save Money with Gym Check-In.
2019-05-23: NEWS1: Health care recovery? 3 trades.NEWS2: Health Care Plan Stocks Stage Healthy Breakout.NEWS3: UnitedHealth Group (UNH) Stock Moves -0.24%: What You Should Know.NEWS4: UnitedHealth Group (UNH) Stock Moves -0.24%: What You Should Know.
2019-05-24: NEWS1: XLV, SZNE: Big ETF Inflows.NEWS2: XLV, SZNE: Big ETF Inflows.NEWS3: Notable ETF Inflow Detected - IHF, UNH, ANTM, CVS.NEWS4: Notable ETF Inflow Detected - IHF, UNH, ANTM, CVS.NEWS5: Shares of Health Insurers Suffering at Prospect of Medicare for All.

Answer: Decrease