user: In this task, you are given an article. Your task is to summarize the article in a sentence.

Q: Stephen McGown was kidnapped from a hotel in Timbuktu along with two other foreign nationals.
In December 2015 a video of Mr McGown and another hostage - Swede Johan Gustafsson, freed in June - was posted on YouTube to show they were alive.
Authorities say he was released after efforts by the two countries' governments and NGO Gift of the Givers.
Africa Live: More on this and other stories
He was freed on 29 July and is now home with his family. But it is not clear why news of the release was delayed - some believe this was a security precaution.
"It was a big surprise when I saw Stephen walk through the door. When I hugged him, he felt as strong as ever," his father told Malcolm McGown told reporters in Pretoria where the announcement of his son's release was made.
He thanked South Africans of "every race and creed" for their support over the last few years.
"I wouldn't ever wish this to happen to anyone else, but they will have the support of the government...I would like to thank President Zuma for everything they did," he said.
The government says no ransom was paid for Mr McGown's release.
"We are happy to announce that finally these efforts have culminated in Mr McGown's release on 29 July 2017. We would like to warmly welcome him back home and wish him good health and good fortune in his life as a free man," International Relations Minister Maite Nkoana-Mashabane told a media briefing in Pretoria.
"It is with sadness though, that his dear mother, Beverly passed on in May 2017 without seeing her son again. The government extends, its deepest condolences to Stephen and his family. May her soul rest in eternal peace," she added.

A: A South African held hostage by al-Qaeda in Mali since 2011 has been released.
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Q: After the blaze at Daw Mill Colliery on 22 February, UK Coal warned that mining might not be able to resume.
The company now says a small team will remain on site to secure the mine over the coming months, but the majority of its 650 staff will be made redundant.
Kevin McCullough, chief executive of UK Coal, said it was a "terrible week".
Daw Mill is the last remaining deep mine on the Warwickshire coalfields, and one of the last in the UK.
Reaction to job cuts
UK Coal said last month's fire had been the largest at a UK coal mine in more than 30 years and was continuing to burn "ferociously".
Over the past year, the company has announced restructuring programmes at the mine and in August it said it was "unlikely" the mine would remain open after 2014.
At the time, UK Coal said it had made overall losses of Â£20.6m in the six months to 30 June, with Daw Mill contributing to a 20% fall in production.
About 56 million tonnes of coal is estimated to remain at the site.
Mr McCullough said: "This has been a terrible week, not just for the company and its employees but also for the energy security of the country, as it brings an end to 47 years of coal production at Daw Mill.
"Having successfully completed the restructuring, and being only weeks away from returning to healthy production, this ferocious fire has dealt a blow to everything we tried to achieve over the last 12 months - in just 10 days."
He said deep mines at Kellingley, in North Yorkshire, and Thoresby, in Nottinghamshire, along with surface mines, would continue to produce coal for use in power stations across the UK.
Mr McCullough said they were looking at whether they could transfer some miners from Daw Mill to those other collieries.
He said the company was also working with the government to help manage the closure of the mine.
Ray Sweet, deputy leader of North Warwickshire Borough Council, said the loss of the mine would be "almost a disaster" for the area.
He added that councillors would be holding an emergency meeting later to discuss how to help the affected workers and their families.
He said: "I can understand UK Coal's situation. The fire in the mine is at dangerous levels and it could blow at any time and that's what they are worried about.
"The one plus from this is that there were no men trapped in the mine by the fire, and you don't want to put anyone else at risk."
Nuneaton MP Marcus Jones called for the colliery to be mothballed rather than completely closed.
The Conservative MP said: "There is still a vast amount of coal down there and there is always the possibility that it could be mined again in the future."
Chris Kitchen, of the National Union of Mineworkers, said the news was "devastating" for the men who relied on the colliery and their families.
He said: "We tend to find many of our members who work in the mining industry have known nothing else."
He said union officials were now determined to get the workers the redundancy settlements "they deserve".
Andrew Mackintosh from UK Coal said that it is the company's "aim" to give the workers their full redundancy pay and that discussions are under way.
He said: "We've got redeployment under way we've moved probably about 50-100 people, but unfortunately for the vast majority, we just won't be able to deploy everybody."

A: Hundreds of jobs will go at a Warwickshire coal mine hit by an underground fire last month, owner UK Coal has announced.
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Q: Media playback is not supported on this device
Kvitova, 26, is undergoing surgery for severe lacerations to all four fingers on her left hand - her playing hand.
The incident, described as a burglary, happened in Prostejov, Czech Republic.
"I am shaken," said Kvitova, adding: "The injury is severe and I will need to see specialists."
Her publicist Karel Tejkal said: "It was a random crime, nobody was going to attack or rob her as Petra Kvitova."
Kvitova is ranked 11 in the world and has won a career total of 19 titles, including Grand Slam victories at Wimbledon in 2011 and 2014.
It is understood she allowed someone posing as a utilities man access to her apartment and while defending herself in a struggle, suffered the injuries to her hand. The intruder is believed to have then run away and is being sought by police.
Kvitova has suffered damage to ligaments and tendons in her left hand, but the full extent of the injuries will not be known until after surgery later on Tuesday.
"Thank you for all your heart-warming messages.
"As you may have already heard, today I was attacked in my apartment by an individual with a knife. In my attempt to defend myself, I was badly injured on my left hand.
"I am shaken, but fortunate to be alive. The injury is severe and I will need to see specialists, but if you know anything about me I am strong and I will fight this. Thank you all again for your love and support and now I would appreciate some privacy while I focus on my recovery."
Kvitova had announced earlier on Tuesday that a foot injury forced her to withdraw from January's Hopman Cup in Perth, Australia.
She had only returned from pre-season training in Lanzarote last week, despite her right foot requiring a protective boot for much of the time.
It meant her hopes of playing in the first Grand Slam of the season were already doubtful, with the Australian Open getting under way on 16 January.
Kvitova had finished the 2016 season strongly, picking up titles in Wuhan and Zuhai, as well as winning the Women's Tennis Association's annual sportsmanship award, for the fourth year in succession.
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A:

assistant: Two-time Wimbledon champion Petra Kvitova said she is "fortunate to be alive" after being injured in a potentially career-threatening knife attack at her home on Tuesday.
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