Given a document, an entity and its sentiment towards the entity, verify if it is the correct sentiment towards the entity. Answer should be yes or no. Note that URLs in the text have been replaced with [Link].

[EX Q]: Verify if the sentiment of the following document towards the entity Spencer Stone is Negative . Spencer Stone  Anthony Sadler and Alek Skarlatos had been thrilled when Clint Eastwood bought the rights to their book about the events on a Thalys high speed train in northern France in August 2015.
Image copyright  AFP Image caption Spencer Stone  leaves the Lesquin hospital after treatment
Image copyright Warner Bros Image caption Judy Greer (left) plays  Spencer Stone 's mother and Jenna Fischer plays that of Alek Skarlatos
"It was at a ceremony the year after the attack  " Stone  recalls. "And afterwards we all huddled up and decided we needed to say something to  him . So we went back into the greenroom and said we have this book coming out and you should make the movie! So Mr Eastwood said to send  him  the book and gave us  his  address."
 Image copyright Warner Bros Image caption Spencer Stone  opted for an army career as did Alek Skarlatos
After school both  Stone and Skarlatos  opted for military careers - Stone in the US Air Force and Skarlatos in the Oregon Army National Guard. Did that military experience influence their split-second decision to try to take down El-Khazzani when he was intent on carnage?
 Image copyright Warner Bros Image caption Spencer Stone (right)  says  he  was driven by fear for  his  life
Stone  who moments before had been dozing  charged down the train aisle as El-Khazzani levelled an assault rifle at  him .
But the weapon didn't fire  possibly because a bullet was faulty.  Stone  ended up with severe gashes to  his  neck and thumb after El-Khazzani lashed out with a box-cutter as they struggled hand-to-hand. Skarlatos and Sadler came to  Stone 's assistance.
"I wasn't really thinking about everyone else: I was just thinking about  myself  " says  Stone . "I just saw that something had to be done.
[EX A]: no

[EX Q]: Verify if the sentiment of the following document towards the entity Mark Sedwill is Positive . Mark Sedwill said the end of 2014 was not a deadline. "It's a goal " he told reporters in the capital. "It's realistic but not guaranteed."
 He said the transition to Afghan control of security will be slow and piecemeal -- often starting with individual districts and building up to the province level. Each area will be evaluated for transfer based on four criteria -- the security situation  the capacity of Afghan security forces in the area  the preparations of NATO forces and the progress toward governance reforms.
 In addition  specialist strike units that target terrorist operatives are likely to keep conducting operations even after the Afghan government has taken over responsibility  Sedwill said.
 He said both 2011 -- the date set for U.S. troops to begin drawing down -- and 2014 are "intermediate milestones" in a larger mission that will last much longer.
 A summit of Afghan leaders and allies Lisbon this weekend will aim to set broad terms for that longer mission. NATO and the Afghan government plan to sign an agreement that will set out the international community's commitment to Afghanistan  including support for training forces  the growth of the Afghan military and intelligence sharing  Sedwill said.
 "We want to build the Afghan leadership so they're taking more and more responsibility for themselves but we recognize it has got to be underwritten by long-term international commitment " Sedwill said.
 Even with the NATO mission appearing to stretch out longer and longer  Sedwill said that the momentum had shifted in NATO's favor.
 "It's still clearly fragile. There are significant risks and there will be a long and hard campaign ahead  but we believe that in 2010 we have achieved what we wished to  which is that we've regained the initiative -- having  candidly  lost it in the past few years " Sedwill said.
 He said that this assessment was the conclusion of an assessment of the Afghan campaign that he had conducted with Gen. David Petraeus  the top commander of U.S. and NATO forces in Afghanistan.
[EX A]: yes

[EX Q]: Verify if the sentiment of the following document towards the entity Christopher Kyba is Neutral . "The areas that are getting brighter rapidly are developing countries " says  Christopher Kyba  a researcher at the German Research Centre for Geosciences in Potsdam . "So a lot of places in South America  Africa and Asia are brightening really  really rapidly  up to 10 percent or more per year  even  in some cases."
With new solid-state lighting technology becoming available  some areas have started making a switch to LEDs. And because this satellite is not able to see all of the light emitted by LEDs   Kyba  says the brightening that's actually happening is probably greater than what's been measured.
"For the United States  for example  we don't see much of a change. But we know that a lot of LEDs are going in. And that means that the United States is almost certainly getting brighter  in terms of how people see the world with their human eyes "  Kyba  explains.
Some have suggested that energy-savings from LEDs will reduce the cost of lighting. But the researchers found that "as light gets cheaper  we use more of it  nearly proportionately to the rate at which it's getting cheaper  " Kyba  says.
On a global or national scale  all this wasted light is expensive   he  says: "It costs a lot of money to radiate that light into space and it's not doing anybody any good."
 He  and others argue that lighting efforts must be well-designed to reduce the amount of light going out into space while still providing a safe and comfortable experience for people on the ground who need to see at night.
The rapid increase in night lighting has been a profound change  a kind of global experiment  that has happened in just the last 100 years. "My mum  for example  grew up on a farm in Saskatchewan  in a time before they had electrification  " Kyba  says. "So  she  grew up with an amazing starry sky  and now  she  lives  within one lifetime  under a very light-polluted sky."
[EX A]:
yes