Generate an appropriate single-sentence summary for the given text such that it includes the main topic of the text.
One example is below.
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: Commissioner Sir Paul Stephenson's saying they were embarrassed by what happened. Demonstrators smashed their way into Conservative Party headquarters that is close to Parliament. There were 35 arrests and 14 people were taken to hospital. The march was a protest against the coalition government's cuts to higher education funding to deal with the deficit. From 2012 universities in England will be able to charge up to £9,000 a year. Before the violence Newsbeat asked some of the demonstrators why they were taking part. Hannah de Freitas, 17, at sixth form college ''I want to go to university. I want to be a teacher. ''It doesn't make any sense making it harder and harder for us to get into uni. We are in an economic crisis right now, we're the ones who are going to have to build back this economy. ''How do you expect us to do that if we don't have the jobs to do that. If we don't have good jobs you cant tax us, if we are working in Sainsbury's how do you expect us to pay the money back. ''I wont be able to go to university, getting loans at the moment is really, really hard. We're going to end up being in debt for years and years to come''. Jenny Sutton, lecturer at a college in London ''I'm here because I think it's completely wrong that while there is record unemployment especially among young people, that this government is imposing tuition fees on a lot of ordinary youngsters that will stop them from going to university. It's completely unfair. ''They should be investing in jobs and investing in the future of our young people. We've got a cabinet of mostly millionaires, who got a free university education and that should be a right for all young people''. Bill, never went to uni, not protesting ''How can you knock a person for wanting to better their education. I think the government should do more to help them. ''I'm a scaffolder, I've got a good job and work for a good company but I've not got much of an education and I find it limits my opportunities''. Facebook comments But some of you on Facebook agree with the rise. Jo Trodden comments: "I haven't got a problem with the rise. I've worked full-time since the day I left school. I fund my own home, car and social life and earn a damn good wage without uni. It's a cop out of the real world." While Mark Day writes, "I think that those who choose uni, good luck to ya but what is wrong with paying fees when you've got a good job, earning good money 'cos of your education."
A:
The head of London's Metropolitan police has admitted they weren't prepared for when Wednesday's student demonstration turned violent.