Generate an appropriate single-sentence summary for the given text such that it includes the main topic of the text.
One example: 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 is here: 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.
Explanation: This is a relevant summary for the given paragraph. It also contains explicit phrases from the given text

Now, solve this: A guard at a Muslim-owned farm near Aluthgama town was killed and dozens of Muslim-run businesses and some homes were attacked despite a curfew. Three Muslims died after an anti-Muslim rally on Sunday by the Bodu Bala Sena (BBS), an extremist Buddhist group. The outbreak of sectarian violence is Sri Lanka's worst in years. Muslims make up 10% of the country's mainly Buddhist population. Many of the attacks on homes and businesses took place in the village of Welipenna, near Aluthgama. There have also been reports of attacks on Muslim businesses in two other towns elsewhere in the south. The man killed at the farm near Aluthgama was an unarmed security guard from the country's Tamil minority. He was hacked to death and his Sinhalese colleague seriously injured when a Buddhist mob raided the farm, the BBC's Charles Haviland in Colombo reports. The mob has been estimated to number between 50 and 120. Reports from Aluthgama say Muslim residents there are running out of food because of a curfew and a blockade by Buddhist extremists. Police say they have arrested 25 people, three-quarters of them Sinhalese, including two they suspect of involvement in the earlier killings. The authorities say more than 80 people have so far been seriously injured in the violence since Sunday. Correspondents say tension has recently been high between the two sides, with Muslims calling on the government to protect them from hate attacks by Buddhists, and Buddhists accusing minorities of enjoying too much influence. For the past couple of years, Sinhalese Buddhist revivalist groups have been staging demonstrations heavily laden with anti-Muslim rhetoric, usually led by monks, our correspondent adds.
Solution:
Renewed violence has flared in southern Sri Lanka as the number killed in violence blamed on hard-line Buddhists rose to four.