Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].

Ex Input:
Students mourn during a candlelight vigil for victims of yesterday ’ s shooting at nearby Marjory Stoneman Douglas High School in Parkland   Fla . on Feb . 15 . ( Reuters / Carlos Garcia Rawlins )  Sixteen - year - old Colleen Lance ’ s English class  spent much of  its  time on Thursday talking about what to do in case someone started shooting . “ Do we try to barricade the door ? Do we try to escape ? What are we supposed do during a shooting ?” she and her fellow students asked their substitute teacher . Lance ’ s classroom in Illinois was a thousand miles from Marjory Stoneman Douglas High School   where a gunman opened fire on Wednesday and killed at least 17 people . But the news hit close to home . “ After Florida   we were all definitely like   ‘ Oh   God   is this going to happen here ?’ ”  Lance  said . “ It ’ s very anxious to go to school after a school shooting . It makes you more aware that you ’ re not safe .”  Lance  wasn ’ t alone in her anxiety . After the latest school shooting   this time in Parkland   Fla .  teenagers across the country returned to their own high schools Thursday for another normal day . But then again   Wednesday had started out as a normal day for Marjory Stoneman Douglas High School . And it was hard not to think about that . Several students responded to a request from The Washington Post via Snapchat to talk about how the news of the tragedy weighed on them as they returned to their own classrooms . ( The Post spoke with some of those students by phone   and contacted their schools to verify their identities and attendance .) [ A loud   new voice after the latest school shooting : Kids wanting to know why adults hadn ’ t done more ] “ It makes me feel really concerned . It feels so much more common now  ” said Rebecca Connor   15   who attends high school in Virginia . “ You don ’ t know where it ’ s going to happen next . It could happen at our school . There ’ s no way to tell .” She added that report after report of troubled students turning on their classmates “ makes me want to be nicer   makes me want to take everyone ’ s feelings into account .” This type of response isn ’ t limited to high school students   said Robin Gurwitch   a psychologist at Duke University Medical Center . But teenagers are particularly vulnerable . “ With teens   the more stressed they are about these events   the more likely they are to have sleep problems   difficulty concentrating and irritability . It can affect school performance and relationships with peers  ” Gurwitch said . For some   the overwhelming sensation wasn ’ t fear but weariness . “ It ’ s become such a common occurrence that it ’ s hard to have a reaction at some point  ” said Aidan McGahey   15   who attends high school in Philadelphia . McGahey said his fellow students sometimes talk about shootings in the immediate aftermath   and that his religion class had tackled the subject this week . Lance dissected the news with her friends   who are similarly interested in keeping up with current events and fall on both sides of the political divide . Connor   a budding news junkie who watches “ Morning Joe ” and keeps up to date with Apple News   confessed that she and her friends didn ’ t discuss school shooting stories much because it would “ make it feel more real .” Gurwitch said that taking time away from the news was critical for teenagers when a story like the Parkland massacre is dominating headlines . She emphasized activities like reading   sports   listening to music   or other activities that allow people to avoid social media or the news for a set period of time . The American Psychological Association has issued similar guidelines for people of all ages dealing with stress related to school shootings in the news . [ We ’ re used to experiencing mass shootings online . But Parkland brought us into the classroom . ] It ’ s not uncommon for schools to have lockdown drills or add security systems to protect students in the event of an attack . But in addition to physical security measures   Gurwitch said   schools should allow discussions about traumatic events “ in a smaller group   so if there are concerns   [ students ] feel comfortable asking a question or commenting on something they may have heard .” No matter how many safe spaces schools create   the teenagers expressed frustration at the recurring issue of school shootings . “ It ’ s not something we can sit back and say   ‘ it ’ s a part of our society ’. We need to be taking active steps to resolve  ” McGahey said . “ I think we need to work to stop this .” “ It makes me upset that it ’ s something I do have to think about . I just want to focus on my grades and graduating and going to college and becoming a young adult  ” Lance said . “ I don ’ t want to think about getting shot when I go to school .”

Ex Output:
'Is this going to happen here?': After Florida shooting teens worry about their safety at school


Ex Input:
and Sen. Ted Cruz -LRB- R-Texas -RRB- , who trailed right behind the frontrunners in the Republican and Democratic primaries , will debate each other and field questions from audience members in a town hall on CNN . 
CNN 's Dana Bash and Jake Tapper -- who questioned Republican primary candidates like Cruz during a debate in 2015 -- will moderate Wednesday night 's debate at 9 p.m. ET . 
The two senators diverge dramatically on the ideological spectrum , with Sanders describing himself as a "democratic socialist" and Cruz often seen as a staunch conservative . 
While Sanders has vilified rich corporations for their alleged greed , Cruz advocated for more than halving the corporate tax rate in September . 
According to Reuters , Cruz sought a 15-20 percent tax rate , similar to proposals issued by Trump and much lower than the current 35 percent rate . 
Cruz has argued for eliminating the estate tax , also known as the "death tax ," while Sanders has called for a progressive estate tax structure . 
Earlier this year , CNN hosted a debate between Sanders and Cruz on health care reform .

Ex Output:
Bernie Sanders and Ted Cruz to Square Off During Televised Tax Reform Debate on Wednesday . 


Ex Input:
"Our growth was driven by gains in almost all regions of the world  particularly China and other emerging markets " CEO Yang Yuanqing said in a conference call.
 Still  Yang cautioned that corporate spending was not expected to revive until at least the second half of 2010  which could weigh on revenues. He said Lenovo also faces pressure from rising component costs.
 Yang said Lenovo plans to expand aggressively in mobile Internet after launching a netbook and a Web-enabled smart phone last month. The company paid $200 million in November to buy back mobile phone assets that it sold earlier to focus on PCs.
 "We believe Lenovo's mobile Internet products have high potential " Yang said. "We will continue to invest heavily in emerging markets and in consumer businesses -- especially mobile Internet -- to achieve sustainable growth."

Ex Output:

Lenovo quarterly profit rebounds on strong sales