Scrutinize the data and tweets to envisage if the closing price of $mrk will swell or contract at 2017-05-17. Please affirm either Rise or Fall.
Context: date,open,high,low,close,adj-close,inc-5,inc-10,inc-15,inc-20,inc-25,inc-30
2017-05-03,-1.8,0.1,-2.0,1.5,1.5,-1.4,-1.7,-1.7,-1.5,-1.2,-1.1
2017-05-04,0.5,0.8,-0.3,-0.4,-0.4,-0.8,-1.2,-1.2,-1.1,-0.8,-0.7
2017-05-05,-0.7,0.2,-0.8,0.9,0.9,-1.2,-1.8,-2.0,-2.0,-1.7,-1.6
2017-05-08,-0.2,0.8,-0.3,0.1,0.1,-0.7,-1.6,-1.9,-2.0,-1.8,-1.6
2017-05-09,1.4,1.5,-0.2,-1.1,-1.1,0.6,-0.3,-0.7,-0.8,-0.7,-0.5
2017-05-10,-1.3,0.0,-1.3,1.0,1.0,-0.3,-1.1,-1.6,-1.7,-1.6,-1.5
2017-05-11,0.5,1.3,-0.2,0.8,0.8,-0.8,-1.6,-2.2,-2.3,-2.3,-2.2
2017-05-12,1.3,1.7,-0.5,-1.3,-1.3,0.4,-0.1,-0.7,-0.9,-1.0,-0.8
2017-05-15,-0.1,0.1,-0.3,-0.1,-0.1,0.4,0.2,-0.4,-0.8,-0.9,-0.8
2017-05-16,-0.5,0.1,-1.0,0.4,0.4,0.1,-0.1,-0.7,-1.1,-1.2,-1.2

2017-05-03: #merck investors gaining confidence, stock closes higher. read more:  $mrk|rt AT_USER a closing word from ken frazier on our 1q financial results. $mrk |rt AT_USER AT_USER buyout target $nwbo topline 
2017-05-04: rt AT_USER cs top pics big pharma $mrk $agn $lly $pfe $bmy $abbv |cs top pics big pharma $mrk $agn $lly $pfe $bmy $abbv |lots of stock trading action today: amd, ma, mrk, coh &amp; more  $coh $mrk $am
2017-05-05: $mrk is in ichimoku golden cross winning 62.86% in the past. |rt AT_USER  teaches #howtoperfect your #socialmedia #presence with #datascience $mrk $cmcsa $txn $dis $aig¡­| teaches #howtoperfect your #
2017-05-06: rt AT_USER "as a leader in biopharmaceutical research, we will continue to pursue the best internal &amp; external scientific opportunities" -f¡­| &lt; review of this fantastic traders teaching servic
2017-05-07: rt AT_USER upcoming pdufa/fda advisory committee meeting/351(k) dates $mrk big pdufa next week $ocul $alks $ibb $srpt $pbyi $ptla |rt AT_USER "we continue to invest in late-stage development programs.
2017-05-08: rt AT_USER trump-care asks americans to kneel before political monarchy $mo $rai $pm $via $twx $unh $aet $antm $bmy $mrk $ilmn |rt AT_USER a closing word from ken frazier on our 1q financial results. 
2017-05-09: rt AT_USER trump-care asks americans to kneel before political monarchy $mo $rai $pm $via $twx $unh $aet $antm $bmy $mrk $ilmn |AT_USER 1 yr ample time for $scyx to revamp it's website, add/publish mo
2017-05-10: #options #maxpain chart for $mrk. free options app  |rt AT_USER pressure mounts on bms, az as merck bags keytruda chemo combo approval  $mrk $bmy $azn #pharma by¡­|rt AT_USER $mrk up 3.4%, $bmy down 2
2017-05-11: rt AT_USER bmo $mrk keytruda 1l-lung approved, solid label, we expect strong uptake; raising target pt 74|why #merck's keytruda just became a lung cancer game changer. read more:  $mrk|#merck stock ri
2017-05-12: merck &amp; co., inc. $mrk director sells $317,700.00 in stock |rt AT_USER  teaches #howtoperfect your #socialmedia #presence with #datascience $mrk $cmcsa $txn $dis $aig¡­| teaches #howtoperfect your
2017-05-13: $vdrm $tsla $kerx $pfe $mrk $adxs $bmy $bac $gs $jpm $amd $dcth $ftr $foxa $csco $himx $eric $amat $qcom $asna¡­ |rt AT_USER vaccine alliance says 300,000 doses of #merck's ebola shot available for em
2017-05-14: rt AT_USER upcoming fda activities: $wint $nvo $blph $regn $sny $pbyi $mrk $nbix $imdz $arql #daytrading #stocks #trading #fda |did #allergan break company policy accepting $teva shares causing a ~$2b
2017-05-15: rt AT_USER #google #dcvax-l overall survival outpacing chemo everyday.$kite $juno $fgen $exel $bmy #opdivo $mrk #keytruda #asco17 comb¡­|$nvax surging after-hours on more insider buys! i believe they 
2017-05-16: rt AT_USER $nwbo $bmy $mrk high side effects pd1 cis take the brakes off the immune system. but low side effects #dcvax puts the p¡­|rt AT_USER #google #dcvax-l overall survival outpacing chemo everyd
Answer:
Fall