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:2018-12-13, Stock:PTR, The news for the past five days is as follows:
2018-12-06: NEWS1: China Shares May Take Further Damage On Friday.NEWS2: China Shares May Take Further Damage On Friday.NEWS3: Canadian Natural Resources Limited (CNQ) Ex-Dividend Date Scheduled for December 07, 2018.NEWS4: Canadian Natural Resources Limited (CNQ) Ex-Dividend Date Scheduled for December 07, 2018.NEWS5: Occidental Petroleum Corporation (OXY) Ex-Dividend Date Scheduled for December 07, 2018.NEWS6: Occidental Petroleum Corporation (OXY) Ex-Dividend Date Scheduled for December 07, 2018.NEWS7: Pacific Coast Oil Trust (ROYT) Ex-Dividend Date Scheduled for December 07, 2018.NEWS8: Pacific Coast Oil Trust (ROYT) Ex-Dividend Date Scheduled for December 07, 2018.
2018-12-07: nan
2018-12-10: NEWS1: Higher Open Predicted For China Stock Market.NEWS2: Higher Open Predicted For China Stock Market.NEWS3: Anadarko Petroleum Corporation (APC) Ex-Dividend Date Scheduled for December 11, 2018.NEWS4: Anadarko Petroleum Corporation (APC) Ex-Dividend Date Scheduled for December 11, 2018.NEWS5: Analysts Predict 25% Gains Ahead For FNI.NEWS6: Analysts Predict 25% Gains Ahead For FNI.
2018-12-11: NEWS1: Additional Support Expected For China Stock Market.NEWS2: Additional Support Expected For China Stock Market.NEWS3: Nabors Industries Ltd. (NBR) Ex-Dividend Date Scheduled for December 12, 2018.NEWS4: Nabors Industries Ltd. (NBR) Ex-Dividend Date Scheduled for December 12, 2018.
2018-12-12: NEWS1: Energy Sector Update for 12/12/2018: PCG, PTR, HES.NEWS2: Energy Sector Update for 12/12/2018: PCG, PTR, HES.NEWS3: China Stock Market Poised To Extend Winning Streak.NEWS4: China Stock Market Poised To Extend Winning Streak.NEWS5: What to Expect from Shell Stock by the End of 2018.NEWS6: China Determined To Avoid Another Natural Gas Crisis.NEWS7: Range Resources Corporation (RRC) Ex-Dividend Date Scheduled for December 13, 2018.NEWS8: Range Resources Corporation (RRC) Ex-Dividend Date Scheduled for December 13, 2018.NEWS9: Evolution Petroleum Corporation, Inc. (EPM) Ex-Dividend Date Scheduled for December 13, 2018.NEWS10: Evolution Petroleum Corporation, Inc. (EPM) Ex-Dividend Date Scheduled for December 13, 2018.NEWS11: Devon Energy Corporation (DVN) Ex-Dividend Date Scheduled for December 13, 2018.NEWS12: Devon Energy Corporation (DVN) Ex-Dividend Date Scheduled for December 13, 2018.NEWS13: Encana Corporation (ECA) Ex-Dividend Date Scheduled for December 13, 2018.NEWS14: Encana Corporation (ECA) Ex-Dividend Date Scheduled for December 13, 2018.NEWS15: Chesapeake Utilities Corporation (CPK) Ex-Dividend Date Scheduled for December 13, 2018.NEWS16: Chesapeake Utilities Corporation (CPK) Ex-Dividend Date Scheduled for December 13, 2018.NEWS17: Cenovus Energy Inc (CVE) Ex-Dividend Date Scheduled for December 13, 2018.NEWS18: Cenovus Energy Inc (CVE) Ex-Dividend Date Scheduled for December 13, 2018.

Answer: Rise