Contemplate the data and tweets to guess whether the closing price of $bbl will surge or decline at 2015-07-21. Please declare either Rise or Fall.
Context: date,open,high,low,close,adj-close,inc-5,inc-10,inc-15,inc-20,inc-25,inc-30
2015-07-07,-1.6,0.3,-3.6,-1.2,-1.2,2.9,6.9,8.2,8.5,8.6,9.1
2015-07-08,1.3,1.7,-0.6,-4.0,-4.0,5.4,9.5,11.8,12.4,12.4,13.1
2015-07-09,1.8,2.2,-0.1,1.7,1.7,2.4,6.0,9.1,9.9,10.0,10.7
2015-07-10,0.9,0.9,-0.4,2.8,2.8,-1.4,2.0,5.3,6.3,6.7,7.2
2015-07-13,-1.3,0.8,-2.0,2.6,2.6,-3.5,-1.1,2.1,3.3,3.8,4.2
2015-07-14,1.3,1.3,-0.3,-1.1,-1.1,-2.1,-0.6,2.5,4.0,4.7,5.1
2015-07-15,1.0,1.3,-0.9,-0.8,-0.8,-0.3,-0.2,2.5,4.5,5.3,5.5
2015-07-16,0.7,1.1,-0.3,1.5,1.5,-0.8,-1.7,0.2,2.6,3.4,3.7
2015-07-17,0.8,0.8,-0.5,-0.3,-0.3,-0.1,-1.7,0.0,2.4,3.4,3.8
2015-07-20,0.5,0.9,-0.3,-0.9,-0.9,0.5,-0.8,0.4,2.9,4.0,4.6


Answer:
Rise