Teacher:In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Teacher: Now, understand the problem? Solve this instance: Australian marathon swimmer Chloe McCardel pulls out of record attempt to swim from Cuba to US after jellyfish sting 
  
 Updated 
  
 Australian marathon swimmer Chloe McCardel has pulled out of a record-breaking attempt to complete the 166-kilometre swim from Cuba to the United States without a shark cage. 
  
 Eleven hours into the attempt, the 29-year-old suffered was stung by jellyfish and was forced to abandon the challenge. 
  
 Once back on dry land, McCardel's team provided an update via Facebook: 
  
 Chloe and the team have arrived in Key West. All safe. Apparently Chloe was stung a few times around the face and mouth and the swelling caused some concerns about breathing efficiently. 
  
 Tim Stackpoole, who has been working with McCardel over the past three years, says her husband would have made the tough decision. 
  
 "Although the jellyfish are not as poisonous as perhaps the box jellyfish that we have here in Australia, the sting is still very excruciating," he said. 
  
 He says McCardle will now have to consider whether she will try again. 
  
 "I think the strategy regarding the jellyfish stings will have to be revisited and studied some more, plus there is of course the cost and the expense of putting such a challenge together," he said. 
  
 "It's in the realms of $200,000 in order to be able to mount one of these challenges." 
  
 Under marathon swimming rules, McCardel was not allowed to touch the boat or hang on to anything while attempting the crossing. 
  
 McCardel did not use a cage but was instead surrounded by an electromagnetic field to ward off sharks from a device held in the water. 
  
 She was accompanied by a 32-person support team which includes weather experts and doctors. 
  
 The swim was timed to minimise the presence of the venomous box jellyfish. 
  
 Jellyfish stings have plagued previous attempts of swimmers including American Diana Nyad, who was stung repeatedly in August on her fourth failed attempt at the crossing. 
  
 Only one person, Australian Susie Maroney in 1997, has completed the Cuba-US swim, but she used a shark cage, which helps cut through the water. 
  
 Maroney says she is not surprised a jellyfish ended McCardle's challenge. 
  
 "I'm not surprised with the jellyfish because I remember the burning sensation," she said. 
  
 "I think that's probably one of the reasons why I was able to make it in the cage as well, because I was a little bit protected by those jellyfish, even though they still came through. 
  
 "But I was never worried about the sharks, only the jellyfish." 
  
 She says McCardle still made a "gutsy attempt" at the record. 
  
 "I think she would be just more probably upset that she's let people around her down," she said. 
  
 "But to even think that you're going to be in the water for more than 30 hours, that is very tough. 
  
 "She's always got next year to try if that's what she wants." 
  
 Topics: human-interest, australia, cuba, united-states 
  
 First posted ||||| Media caption Footage of Chloe McCardel at the start of her challenge 
  
 A jellyfish sting has ended Australian endurance swimmer Chloe McCardel's attempt to become the first person to swim from Cuba to Florida without a protective shark cage. 
  
 The "debilitating" sting forced her to abandon the 166km (103-mile) swim after 11 hours, her support team said. 
  
 It added that the athlete would need 24 hours to recuperate from the severe injury. 
  
 Ms McCardel earlier described the swim as "the hardest in the world today". 
  
 She had hoped to complete the distance in about 60 hours. 
  
 'Tough night' 
  
 Ms McCardel's team said on Wednesday evening that she had been taken to one of her support vessels and was sailing toward Key West. 
  
 Her failed try comes almost a year after American swimmer Diana Nyad abandoned her fourth attempt at the same feat. 
  
 Ms Nyad, 62, was pulled from the water after she had been stung repeatedly in the face by jellyfish and was buffeted by strong waves and currents. 
  
 "It's a tough night for Chloe McCardel, a superior swimmer and an exemplary spirit," Ms Nyad wrote in a post on her Facebook page. 
  
 "I send Chloe congratulations for her many months of training and her courageous foray into those dangerous waters." 
  
 Ms McCardel jumped into the water from Havana's Marina Hemingway at 10:00 local time (14:00 GMT). 
  
 The athlete from Melbourne had covered about 19km by late afternoon, being monitored by coaches and doctors from onboard boats. 
  
 Speaking at a news conference on Tuesday, Ms McCardel said she had been training for this particular swim for six months, and had spent a lot of time "analysing the reasons and mistakes" which had prevented other swimmers from completing it. |||||
Student:
An Australian woman had to cut short her Cuba-to-Florida swim attempt yesterday after jellyfish put an end to her effort, reports Australia's ABC. Chloe McCardel, who would have been the first person to swim the 103-mile distance without a shark cage, called it quits after 11 hours and multiple jellyfish stings—which often end swimmers' attempts at the feat. McCardel will now consider whether to reattempt the swim she called "the hardest in the world today," the BBC reports. Her husband says they will revisit how to deal with jellyfish, but cost is a factor. "It's in the realms of $200,000 in order to be able to mount one of these challenges."