Teacher: Generate an appropriate single-sentence summary for the given text such that it includes the main topic of the text.
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By Marianna SpringSpecialist disinformation reporter, BBC News The adverts show the Democratic Party challenger with an earpiece, and say that he refused to have his ears checked for devices prior to the debate. The Biden campaign rejected the claims. The Trump campaign adverts ask: "Why won't Sleepy Joe commit to an ear test?" and "Who is in Joe's ear?" Accusations that presidential candidates have received debate help via hidden hearing devices are familiar, albeit unproven. Such allegations have been levelled against both Republican and Democratic candidates in the past. Prior to Tuesday's debate, the rumour about Mr Biden's supposed earpiece was circulating on several social networks, and was being promoted by the Trump campaign. At least 15 versions The advertising campaign was launched after the debate, and also promotes two other baseless but widely shared rumours about Mr Biden. One suggested he asked for breaks during the debate, and another accused him of refusing a "drug test". The photo featured in the advert is not from Tuesday's debate. It was first shared online in September 2019. In a number of the adverts, it has been doctored to show Mr Biden wearing wireless Apple headphones. This was not the case in the original image. Some versions circle the ear featuring the headphone. By Wednesday evening, there were at least 15 different versions of the advert, and according to Facebook's Ad Library, they had reached at least 10 million users. Facebook has pledged to label posts containing voting misinformation and point users towards accurate information ahead of the election. However its policy does not involve fact-checking political speech, including in advertisements. The company declined to comment about the latest Trump ad campaign. Rumour origins Hours before the debate, the claims went viral on Facebook and YouTube. Identical memes were pushed by a number of popular Facebook pages with names such as US Conservative and Unhinged Left. They claimed "Joe Biden should be inspected for a hidden earpiece as well as submit to a drug test before the debate". These memes are subject to fact-checks - and some have had warning labels applied to them on Facebook. The claims were picked up by Fox News and other conservative news outlets. They were further amplified by supporters of QAnon, an unfounded a conspiracy theory that claims President Trump is fighting a secret war against elite Satan-worshipping paedophiles. Those who believe in QAnon are known for promoting political disinformation on social media which targets opponents of the president. They shared close-up pictures of Mr Biden's ears, alleging a listening device was visible. During the debate, some also shared photos of a fold in Mr Biden's shirt, claiming it was caused by a wire, and of a supposed device on his wrist, where he wears a rosary in memory of his late son Beau. Nothing new Conspiracy theories about secret listening devices have been recycled in presidential election campaigns for the past two decades. Democratic candidate Hillary Clinton faced similar unfounded claims ahead of the 2016 presidential election. In 2004, rumours circulated among left-wing sites and blogs that President George W Bush was being aided by a secret earpiece. None of those allegations were found to be true. Even if a candidate did wear an earpiece, any advantage would be questionable. As TV and radio presenters can attest, listening to someone while simultaneously talking during the back-and-forth of a live event is a difficult skill to master.
Solution: US President Donald Trump's re-election campaign is running hundreds of Facebook advertisements pushing an unfounded conspiracy theory that Joe Biden cheated during the first US presidential debate.
Reason: This is a relevant summary for the given paragraph. It also contains explicit phrases from the given text

Now, solve this instance: By Julian O'NeillBBC News NI Business Correspondent The Finance Committee produced a roll-call of individuals and organisations it wants evidence from, potentially beginning as early as next week. Chief among them is Ian Coulter, former managing partner of law firm, Tughans. Unknown to the firm, he diverted funds to an Isle of Man bank account to facilitate payments to the deal fixers. 'Letter' The committee is examining claims, made in the Dáil (Irish Parliament) that £7m had been "reportedly earmarked" for a Northern Ireland politician. The allegations were made by Independent Dáil member, Mick Wallace, on 2 July. In a statement, Finance Committee chair Daithí McKay said: "We have already started contacting all of those involved in this transaction to come before the committee. "That includes NAMA officials, Mick Wallace, Tughans as well as others who may have information on the transactions." But Irish state broadcaster RTÉ has reported that Mr Wallace is unlikely to accept requests to appear before either the Stormont committee, or before a similar investigation being carried out by the Public Accounts Committee (PAC) in the Republic of Ireland. RTÉ News said it had seen a letter in which Mr Wallace allegedly told the clerk of the PAC committee that his appearance would not serve any purpose. 'Cloud' The Republic of Ireland's state-controlled National Asset Management Agency (Nama) sold its entire 850-property loan portfolio in Northern Ireland to the New York investment firm Cerberus for more than £1bn. The sale, completed in April 2014, was the biggest ever property deal in Northern Ireland. During a public session of the Stormont committee on Tuesday morning, the DUP's Paul Girvan said: "There's enough of a cloud hanging over this place and now to have implications that there's a politician involved in what was a dirty scheme... it's vitally important we move as quickly as possible." Politicians The committee said if witnesses choose not to appear it can compel them to attend. Those it wants to hear from include Nama Northern Ireland advisors Frank Cushnahan and Brian Rowntree. But Dominic Bradley of the SDLP said some politicians should also appear and be questioned. "I think it would be remiss of us to call legal personnel and business people and not call politicians," he said. "There is evidence politicians met with PIMCO and they should be witnesses during our investigations." Mr Coulter has stayed quiet to the media, others, including all the firms involved, have issued statements denying doing anything improper. Tughans retrieved the money diverted from its account and Mr Coulter left the practice.
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Stormont MLAs have met to draw up a list of witnesses to quiz over the Nama loan sale, with one referring to what went on as "a dirty scheme".