Contemplate the data and tweets to guess whether the closing price of $mrk will surge or decline at 2015-05-19. 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
2015-05-05,-0.3,0.3,-0.7,-0.2,-0.2,-0.7,-2.4,-3.2,-3.7,-4.1,-4.0
2015-05-06,0.3,0.5,-0.5,-0.4,-0.4,-0.2,-1.6,-2.6,-3.1,-3.5,-3.6
2015-05-07,-0.4,0.7,-0.6,0.1,0.1,0.0,-1.2,-2.4,-2.9,-3.3,-3.5
2015-05-08,0.4,1.1,-0.1,0.7,0.7,-0.4,-1.4,-2.7,-3.3,-3.8,-4.1
2015-05-11,1.1,1.1,-0.3,-1.2,-1.2,0.6,0.3,-1.2,-1.9,-2.4,-2.7
2015-05-12,0.2,0.5,-0.6,-0.9,-0.9,1.2,1.1,-0.1,-0.8,-1.4,-1.8
2015-05-13,0.7,1.1,-0.4,-0.4,-0.4,1.3,1.5,0.5,-0.3,-0.8,-1.2
2015-05-14,-0.5,0.2,-1.2,1.0,1.0,0.1,0.5,-0.2,-1.1,-1.6,-2.1
2015-05-15,-0.5,0.0,-0.7,0.8,0.8,-0.8,-0.2,-0.7,-1.6,-2.2,-2.6
2015-05-18,0.3,0.7,0.0,-0.4,-0.4,-0.5,0.1,0.0,-1.0,-1.6,-2.1

2015-05-05: rt AT_USER $gild $mrk after markman ruling, case will proceed to expert discovery and summary judgment, hearing on latter schedul…|rt AT_USER $gild $mrk negative claim construction ruling for $gild in
2015-05-06: $ibm news: "don't fall into this dividend investing trap $ibm $ip $lmt $mrk $son"   analyze: |mrk merck &amp; co., inc. yieldclick here -&gt; trending $mrk $cat $xle $twtr #mrk #invest #nasdaq
2015-05-08: dow #stocks trend $jpm $mrk $nke $cat $v $msft $axp $ibm $gs $ge $dis $unh $utx $mcd $cvx $xom $csco $vz $mmm  @ |rt AT_USER $isr $mrk  isoray cesium-131 5/8 2:30pm study ...implants resulted in no lo
2015-05-09: xoma xoma ltd. ex-div dateclick here -&gt; trending $xoma $tlt $biib $mrk #xoma #stock #tradeideas
2015-05-10: $xoma $mrk:why making dramatic moves: xoma corporation (nasdaq:xoma ...:
2015-05-11: rt AT_USER roth the state of immunotherapy 3.0: "silver linings immunobook"; bright horizons $cldx $lbio $mrk $bmy |$mrk - statement of changes in beneficial ownership (4) 
2015-05-12: merck  &amp; co. evp adam schechter sells $642,719 in $mrk |$mrk received a new alert. find out why at  #stocks #daytrading #trading #mkt  #nyse #nasdaq #markets 238|dow jones descendió 0.20% colocánd
2015-05-13: merck  &amp; co. evp adam schechter sells $642,719 in $mrk |the "stock options 101" hd video package is 100% free.  $wfm $ko  $mrk  $bmgp $spg  $mnkd 
2015-05-14: erx direxion daily energy bull 3x shares eod dataclick here -&gt; trending $erx $xme $adbe $mrk #erx #invest…|our alert on $tlfx gained 77.77% from last week's low to monday's close! big news:  #break
2015-05-15: tim anderson sees merck coming out of sglt2 safety woes with stronger januvia sales.$mrk $jnj $lly|rt AT_USER view today's #pharma daily news round-up video: takeda, $amgn, amg 334, actavis, $srne, cy
2015-05-16: ntap network appliance, inc. quotesclick here -&gt; trending $ntap $oa $tsl $mrk #ntap #finance #finance|hayul #hayul 1luckyjimmy: mack merrimack pharmaceuticals, inc. day lowclick here -&gt; trending
2015-05-17: AT_USER AT_USER AT_USER AT_USER  sell $mrk?$5.3bn vaccine revenues,13%of sales, far from a "rounding error"
2015-05-18: vrx valeant pharmaceuticals intl, inc. prev closeclick here -&gt; trending $vrx $oled $mrk $vois #vrx #tradeideas…
Answer:
Contemplate the data and tweets to guess whether the closing price of $mrk will surge or decline at 2015-05-19. 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
2015-05-05,-0.3,0.3,-0.7,-0.2,-0.2,-0.7,-2.4,-3.2,-3.7,-4.1,-4.0
2015-05-06,0.3,0.5,-0.5,-0.4,-0.4,-0.2,-1.6,-2.6,-3.1,-3.5,-3.6
2015-05-07,-0.4,0.7,-0.6,0.1,0.1,0.0,-1.2,-2.4,-2.9,-3.3,-3.5
2015-05-08,0.4,1.1,-0.1,0.7,0.7,-0.4,-1.4,-2.7,-3.3,-3.8,-4.1
2015-05-11,1.1,1.1,-0.3,-1.2,-1.2,0.6,0.3,-1.2,-1.9,-2.4,-2.7
2015-05-12,0.2,0.5,-0.6,-0.9,-0.9,1.2,1.1,-0.1,-0.8,-1.4,-1.8
2015-05-13,0.7,1.1,-0.4,-0.4,-0.4,1.3,1.5,0.5,-0.3,-0.8,-1.2
2015-05-14,-0.5,0.2,-1.2,1.0,1.0,0.1,0.5,-0.2,-1.1,-1.6,-2.1
2015-05-15,-0.5,0.0,-0.7,0.8,0.8,-0.8,-0.2,-0.7,-1.6,-2.2,-2.6
2015-05-18,0.3,0.7,0.0,-0.4,-0.4,-0.5,0.1,0.0,-1.0,-1.6,-2.1

2015-05-05: rt AT_USER $gild $mrk after markman ruling, case will proceed to expert discovery and summary judgment, hearing on latter schedul…|rt AT_USER $gild $mrk negative claim construction ruling for $gild in
2015-05-06: $ibm news: "don't fall into this dividend investing trap $ibm $ip $lmt $mrk $son"   analyze: |mrk merck &amp; co., inc. yieldclick here -&gt; trending $mrk $cat $xle $twtr #mrk #invest #nasdaq
2015-05-08: dow #stocks trend $jpm $mrk $nke $cat $v $msft $axp $ibm $gs $ge $dis $unh $utx $mcd $cvx $xom $csco $vz $mmm  @ |rt AT_USER $isr $mrk  isoray cesium-131 5/8 2:30pm study ...implants resulted in no lo
2015-05-09: xoma xoma ltd. ex-div dateclick here -&gt; trending $xoma $tlt $biib $mrk #xoma #stock #tradeideas
2015-05-10: $xoma $mrk:why making dramatic moves: xoma corporation (nasdaq:xoma ...:
2015-05-11: rt AT_USER roth the state of immunotherapy 3.0: "silver linings immunobook"; bright horizons $cldx $lbio $mrk $bmy |$mrk - statement of changes in beneficial ownership (4) 
2015-05-12: merck  &amp; co. evp adam schechter sells $642,719 in $mrk |$mrk received a new alert. find out why at  #stocks #daytrading #trading #mkt  #nyse #nasdaq #markets 238|dow jones descendió 0.20% colocánd
2015-05-13: merck  &amp; co. evp adam schechter sells $642,719 in $mrk |the "stock options 101" hd video package is 100% free.  $wfm $ko  $mrk  $bmgp $spg  $mnkd 
2015-05-14: erx direxion daily energy bull 3x shares eod dataclick here -&gt; trending $erx $xme $adbe $mrk #erx #invest…|our alert on $tlfx gained 77.77% from last week's low to monday's close! big news:  #break
2015-05-15: tim anderson sees merck coming out of sglt2 safety woes with stronger januvia sales.$mrk $jnj $lly|rt AT_USER view today's #pharma daily news round-up video: takeda, $amgn, amg 334, actavis, $srne, cy
2015-05-16: ntap network appliance, inc. quotesclick here -&gt; trending $ntap $oa $tsl $mrk #ntap #finance #finance|hayul #hayul 1luckyjimmy: mack merrimack pharmaceuticals, inc. day lowclick here -&gt; trending
2015-05-17: AT_USER AT_USER AT_USER AT_USER  sell $mrk?$5.3bn vaccine revenues,13%of sales, far from a "rounding error"
2015-05-18: vrx valeant pharmaceuticals intl, inc. prev closeclick here -&gt; trending $vrx $oled $mrk $vois #vrx #tradeideas…
Answer:+Rise