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

[Q]: Sadiq Khan said there was real concern among business leaders that companies could leave the City.
It comes as the mayor of Frankfurt told BBC London his city's "arms and our doors are open".
London-based financial technology firm Transferwise said it had been courted by several European countries already.
The company's chief executive Taavet Hinrikus said his company was being courted by Ireland and Switzerland among others.
A spokesman for Transferwise, which processes international currency payments, said moving away from London was "not something the firm was actively talking about".
The spokesman added that Transferwise had chosen to make its base in London and that the company "hoped it could make that work".
But he added that businesses needed greater certainty in order to operate successfully.
Mr Khan told BBC London there was genuine concern among leading figures in the City he had spoken to, including Bank of England governor Mark Carney and London Stock Exchange chief executive Xavier Rolet.
"There is a concern that if we don't have access to the single market, if we haven't got passporting of financial services, that could lead to businesses leaving London to go to those cities where there is access to the single market," he said.
The latest government figures estimate the FinTech industry - financial technology - generates about Â£20bn in annual revenue.
And Mr Khan said it was just one industry being targeted by other European centres.
"The mayor of Milan was here this week, I met with him, Why was he here? He wants to pinch our business. Who can blame him?
"The mayor of Paris and the deputy mayor have already said they're rolling out the red carpet to invite businesses to come to Paris. Why wouldn't they?"
Dublin-based investment group IDA Ireland is planning an advertising campaign in the autumn highlighting Ireland's tax regime, its proximity to London, and the shared language to businesses thinking about relocating.
Peter Feldmann has had a busy few days. Frankfurt's lord mayor has been celebrating the birth of his second daughter on Monday night.... and who knows perhaps a new lease of life for his city too.
He greets us in the grand surroundings of the Kaiser Hall in Frankfurt's equally grand City Hall and can barely contain his smiles.
Opportunity, he believes, has come knocking with the UK's decision to leave the EU.
"Our arms and our doors are open," he tells me when it comes to London businesses big and small that are looking to relocate.
At a business meeting the day after the Brexit vote, people cheered and clapped him saying: "here is the winner from Brexit".
In the coming weeks his team will fly to London to make their case. Frankfurt already has a video selling its wares and a team of English speakers taking calls from businesses.
Mr Khan told the BBC: "London is open: we're open for talent, we're open for business, we're open for investment. The government has got to help me do my job as mayor to make sure that we send that message out loud and clear around the country, around Europe and around the world.
"We've got competitors who want to pinch that business, we've got competitors who want businesses to go to their cities. We cannot allow that to happen."
Business and Energy Secretary Greg Clark said giving businesses the certainty they need to plan for the future is a "key priority".
"That's why we are working closely and collaboratively with businesses across all sectors to ensure that the UK remains the best place in the world to do business," he said.
A minute after the Brexit vote was announced Frankfurt launched a website and phone line in a bid to encourage businesses that want to remain in the single market to relocate there.
The mayor of Frankfurt, Peter Feldmann reiterated that invitation on Thursday, telling BBC London: "If you want to become rich, if you want to stay wealthy, you should have a [department] in Frankfurt.
"If you want to become isolated and see from a binocular perspective what is going on in the world, stay in London."
Meanwhile, German business development group Berlin Partner said earlier this week that at least 10 London start-up firms had made enquiries about moving to Berlin since the UK voted to leave the EU last month.
Berlin is attempting to woo London's FinTech industry and, like Frankfurt, has stepped up efforts to promote itself as a more affordable and creative alternative to other cities.
At London's FinTech conference earlier this week, Berlin Partner director Stefan Franzke said: "The most concrete enquiries are coming from London FinTechs. They are considering a move to Berlin so as not to lose access to the European single market."
Berlin's senator for economics, technology and research, Cornelia Yzer, has sent hundreds of letters to UK businesses and earlier this week travelled to London Fintech Week to lobby start-up founders.
She told BBC London: "We are an international community and that's why companies will find talents there they need. So welcome, and we'll bring all hurdles down, we'll offer programmes for relocation. So pick up the phone talk to me and my team and relocate to Berlin."
More than 100 companies have already been in touch with her team since the Brexit vote, she says, and in September they will open an office in London.
But Mark Boleat policy chairman at the City of London Corporation said he remained confident London would continue to be the world's leading financial centre.
"While some European cities might look to entice businesses and jobs to the continent, we have so many strengths which make us such an attractive place to do business," he said
"Highly skilled workers, excellent infrastructure and a stable regulatory system are but some of those, and crucially the capital is a place where people want to work and live."
Asked whether London had been ill prepared for the Brexit result, Mr Khan said that was now important was that London now dealt "with the hand that we've been given".
Mr Khan said it was "really important that we explain to the government it's in the country's interest for them to listen to us."
"Uncertainty isn't helping."
[A]: The mayor of London has warned of the growing threat of foreign cities trying to steal business from the capital, one month on from the EU referendum.


[Q]: Boyle, 40, from Glasgow, said the paper had defamed him with an article published on 19 July 2011.
Daily Mirror publisher Mirror Group Newspapers (MGN) defended the piece "on the basis of truth and fair comment".
However jurors ruled in favour of Boyle.
The comedian said he was "very happy" as he left court.
Jurors awarded Boyle £50,400 after concluding that the racist description was defamatory.
Jurors had been shown footage from the BBC satirical show Mock The Week, in which Boyle and other comedians discussed immigration.
He was given further damages of £4,250 after the jury found the Mirror's report saying Boyle had been "forced to quit" Mock the Week was defamatory.
The comedian said The Daily Mirror newspaper had "misunderstood" the context of his use of language in jokes, adding the accusation of racism "goes against everything I've tried to do in my work, to do in my life".
The Glasgow-born comedian said he had been "pretending" to be someone with racist views during the episode.
He said he had "actively campaigned" against racism and he thought it was "important" to highlight the issue in his routines by mocking the attitudes of racists, whom he "despised".
The comedian's humour has often proved controversial with audiences.
Last year, broadcasting watchdog Ofcom upheld more than 500 complaints about his Channel 4 show Tramadol nights, during which he joked about model Katie Price's disabled son, Harvey.
In 2008, the BBC apologised when Boyle made a joke about Palestine on the Radio 4 comedy show Political Animal.
A year after that, BBC Two's Mock The Week was criticised by the BBC Trust over comments Boyle made on the show about swimmer Rebecca Adlington's appearance.
[A]: Comedian Frankie Boyle has won £54,650 in damages after a High Court jury concluded that the Daily Mirror had libelled him by describing him as "racist".


[Q]: Goals either side of the interval by Sean Morrison and Nathaniel Mendez-Laing gave the Bluebirds a 2-0 win over Sheffield United.
Winger Mendez-Laing took his season's tally to four with a superb strike.
The Blades went close through Billy Sharp and had a penalty shout turned down, but were comfortably beaten.
Cardiff came into the game on a high after an impressive 3-0 win over Aston Villa, with manager Neil Warnock relishing the challenge of the team he supported as a child - and managed for eight years.
Sheffield United suffered their first defeat in 20 games when beaten 1-0 by Middlesbrough at the weekend, and found the Bluebirds in irresistible mood on a calm Cardiff night.
The Bluebirds joined the Football League in 1910 and are top of the early-season table after ending a 107-year wait for maximum return from their opening three games.
They have nine points along with Ipswich and Wolves, who Cardiff play at Molineux on Saturday.
The Blades matched Cardiff in the early stages, but were let off when Jazz Richards hit a post and then Kenneth Zohore slid the ball past the post after being put through by Junior Hoilett.
The breakthrough came in the 44th minute when skipper Morrison headed in Joe Ralls' corner.
Mendez-Laing's stunning finish to a sweeping team move in the 55th minute put Warnock's team firmly in charge, and the Blades did well not to concede a third.
Ched Evans made an appearance off the bench for the Blades, but it was Sharp and David Brooks who had their best efforts, and Leon Clarke headed a good chance wide.
But it was United supporter Warnock who had the biggest smile as his Cardiff side kept their third successive Championship clean sheet.
Cardiff manager Neil Warnock told BBC Radio Wales:
"To start with three league wins on the bounce is great - I think it's lovely as a record like that because it takes the pressure off.
"I remember not winning for seven games and it was horrible.
"It's great for the fans, but we've got to go up to Wolves now and see if we can perform up there."
Sheffield United manager Chris Wilder:
"We're going to endure some tough nights, we totally understand that coming into the division after six years out of it, but we haven't been overrun against players who can hurt you.
"We've had two really tough games against Middlesbrough and Cardiff, but we haven't embarrassed ourselves.
"We competed well enough against the league leaders, we never folded and kept going to the end, but we do need to get better."
Match ends, Cardiff City 2, Sheffield United 0.
Second Half ends, Cardiff City 2, Sheffield United 0.
Corner,  Sheffield United. Conceded by Neil Etheridge.
Attempt saved. John Fleck (Sheffield United) left footed shot from outside the box is saved in the bottom left corner. Assisted by David Brooks.
Corner,  Sheffield United. Conceded by Neil Etheridge.
Attempt saved. Ched Evans (Sheffield United) right footed shot from outside the box is saved in the top centre of the goal. Assisted by John Fleck.
Substitution, Cardiff City. Greg Halford replaces Kenneth Zohore.
Foul by Chris Basham (Sheffield United).
Loïc Damour (Cardiff City) wins a free kick on the left wing.
Chris Basham (Sheffield United) wins a free kick in the attacking half.
Foul by Kenneth Zohore (Cardiff City).
Attempt blocked. David Brooks (Sheffield United) left footed shot from outside the box is blocked. Assisted by John Fleck.
Attempt blocked. Billy Sharp (Sheffield United) right footed shot from the centre of the box is blocked. Assisted by John Fleck.
Attempt missed. Kenneth Zohore (Cardiff City) left footed shot from the centre of the box is too high. Assisted by Sean Morrison with a headed pass following a set piece situation.
Foul by Ched Evans (Sheffield United).
Joe Ralls (Cardiff City) wins a free kick in the attacking half.
Substitution, Cardiff City. Danny Ward replaces David Junior Hoilett.
Attempt missed. Leon Clarke (Sheffield United) header from the centre of the box is high and wide to the right. Assisted by John Fleck with a cross following a corner.
Corner,  Sheffield United. Conceded by Neil Etheridge.
Attempt saved. David Brooks (Sheffield United) left footed shot from the left side of the box is saved in the top centre of the goal. Assisted by Kieron Freeman.
Offside, Cardiff City. Jazz Richards tries a through ball, but David Junior Hoilett is caught offside.
Attempt missed. Bruno Ecuele Manga (Cardiff City) header from the right side of the box is high and wide to the right. Assisted by Jazz Richards with a cross.
Leon Clarke (Sheffield United) wins a free kick on the right wing.
Foul by Sol Bamba (Cardiff City).
Substitution, Sheffield United. David Brooks replaces Enda Stevens.
Attempt missed. Nathaniel Mendez-Laing (Cardiff City) right footed shot from more than 40 yards on the right wing is high and wide to the left. Assisted by Neil Etheridge following a fast break.
Corner,  Sheffield United. Conceded by Sol Bamba.
Ched Evans (Sheffield United) wins a free kick on the right wing.
Foul by David Junior Hoilett (Cardiff City).
Foul by Ched Evans (Sheffield United).
Joe Ralls (Cardiff City) wins a free kick in the defensive half.
Attempt blocked. Leon Clarke (Sheffield United) left footed shot from the left side of the box is blocked. Assisted by Billy Sharp.
Paul Coutts (Sheffield United) wins a free kick in the defensive half.
Foul by Loïc Damour (Cardiff City).
Offside, Cardiff City. Sean Morrison tries a through ball, but Kenneth Zohore is caught offside.
Substitution, Cardiff City. Loïc Damour replaces Lee Tomlin.
Attempt missed. David Junior Hoilett (Cardiff City) right footed shot from the left side of the box misses to the left. Assisted by Joe Ralls.
Foul by John Fleck (Sheffield United).
Lee Tomlin (Cardiff City) wins a free kick in the attacking half.
Attempt blocked. John Fleck (Sheffield United) left footed shot from outside the box is blocked. Assisted by Billy Sharp.
[A]:
Cardiff City have won their opening three league games of a season for the first time in the Championship club's 107-year history.


