Generate an appropriate single-sentence summary for the given text such that it includes the main topic of the text.
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Q: 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.
A: 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.
Rationale: This is a relevant summary for the given paragraph. It also contains explicit phrases from the given text
Q: About 50 boats were affected when water was accidently drained after a sluice gate "suddenly opened" on the River Avon last Tuesday. Houseboat owner Avril McGovern said the Environment Agency (EA) were "giving us everything we need". The EA said an engineer would remain "permanently on site until we know the cause of the failure". Water levels dropped by about 1.8m (5.9ft) after the fault at Twerton sluice gate and boat owners were alerted by a post on the Canal and River Trust's website. Ms McGovern was out for dinner with friends when she received messages about the river levels changing last Tuesday. She thought her boat would be safe as it was behind the lock but when she arrived, it was "resting on the bottom". She said: "The Environment Agency are going to provide a hull survey on the boats affected to look at the integrity of the hulls. "They are bringing a crane in to lift us out, although they said they will need to remove some trees to do that which I'm not happy about." Ian Withers, from the EA, said they needed to "find a piece of land to accommodate a crane to lift the boats out" for a hull inspection, and hoped to "get that rolling by Thursday". He said: "In the meantime we have people who we will continue to look after at local hotels. "We understand that some people have lost everything and recognise the trauma and anxiety felt as a result of this incident, and want to help people get their lives back on track." He said the EA would help those with a "reasonable and legitimate claim to compensation".
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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.
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Five boats on a river in Bath have been refloated after being submerged last week when water levels dropped.