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:2019-05-20, Stock:NGG, The news for the past five days is as follows:
2019-05-13: nan
2019-05-14: nan
2019-05-15: NEWS1: UK energy network firms rattled by Labour state ownership plan.NEWS2: Utilities Drop in U.K. on Labour Nationalization Report.NEWS3: Did You Manage To Avoid National Grid's (LON:NG.) 22% Share Price Drop?.
2019-05-16: NEWS1: National Grid warns of legal challenge to Labour renationalisation.NEWS2: National Grid Falls as Nationalization Talk Casts Shadow.
2019-05-17: NEWS1: NATIONAL GRID PLC (NGG) Q1 2019 Earnings Call Transcript.NEWS2: National Grid says no new NYC natgas customers without Williams pipeline.NEWS3: U.K.’s National Grid Creates More Jobs in America Than at Home.

Answer: Decrease