Examine the data and tweets to deduce if the closing price of $slb will boost or lower at 2015-07-31. Kindly confirm either Rise or Fall.
Context: date,open,high,low,close,adj-close,inc-5,inc-10,inc-15,inc-20,inc-25,inc-30
2015-07-17,0.6,1.5,-0.6,-0.2,-0.2,0.5,0.2,0.8,1.6,2.7,3.6
2015-07-20,0.9,1.2,-0.1,-0.2,-0.2,0.6,0.5,0.8,1.7,2.6,3.5
2015-07-21,-1.1,1.2,-1.4,0.9,0.9,-0.6,-0.5,-0.3,0.6,1.4,2.4
2015-07-22,-1.5,0.7,-2.0,1.1,1.1,-1.3,-1.3,-1.5,-0.7,0.1,1.0
2015-07-23,-0.9,0.7,-1.3,0.9,0.9,-1.7,-1.9,-2.2,-1.7,-1.0,-0.1
2015-07-24,3.4,3.5,-0.3,-3.6,-3.6,1.8,1.7,1.4,1.8,2.5,3.4
2015-07-27,0.3,0.9,-0.6,-1.4,-1.4,2.8,2.8,2.7,2.9,3.7,4.5
2015-07-28,0.0,0.7,-1.6,0.9,0.9,1.4,1.5,1.6,1.8,2.5,3.3
2015-07-29,-2.3,0.5,-2.3,1.7,1.7,-0.6,-0.1,0.0,-0.0,0.6,1.3
2015-07-30,0.6,1.1,-0.5,-0.4,-0.4,-0.7,0.3,0.5,0.4,0.9,1.5

2015-07-17: offshore drillers under heavy pressure  $slb $cop $esv $nov|schlumberger could experience more volatility  $slb
2015-07-20: rt AT_USER slb schlumberger ltd. e.p.s.$slb $dslv $slnn $feye #slb #tradeideas #stocks
2015-07-21: schlumberger - north america is almost irrelevant  $slb
2015-07-23: s&amp;p100 #stocks performance $abt $c $bac $acn $emc $low $celg $jpm $bk $ms $slb $ba $all $cost $wfc $nke  more@ | &lt;- want to make $600,00 in one year trading? check out how this guy did it! $spy
2015-07-24: rt AT_USER $slb: analyst action by macquarie on schlumberger:  |infn insys therapeutics, inc. bid size$infn $gdxj $nflx $slb #infn #finance #tradeideas|ewm malaysia ishares % change$ewm $googl $slb $s
2015-07-25: gdx market vectors gold miners filings$gdx $ewz $slb $jcp #gdx #finance #investing|slb schlumberger ltd. ideas$slb $vltc $smn $bce.to #slb #investing #stock|bp bp amoco plc 52wk low$bp $qld $abx $slb 
2015-07-30: slb schlumberger ltd. 52wk high$slb $fshox $cgg $oil #slb #invest #tradeideas
Answer:
Fall