TASK DEFINITION: In this task, you are given news articles and you need to generate a highlight, i.e., a short summary, with a maximum length of 10 lines.
PROBLEM: (CNN) -- Authorities found four human bodies abandoned in the Arizona desert Thursday. Initial indications point to exposure as the probable cause of death, said Victor Brabble, a spokesman for U.S. Customs and Border Protection. "It is probable that they are immigrants attempting to cross into the U.S.," he said. "However, we don't have enough to draw a conclusion on it now." The bodies were found near Gila Bend, Arizona, about 70 miles north of the border. They have not been identified, the Maricopa County Sheriff's Office said. Immigrants often try to cross the Sonoran Desert's harsh terrain, and there are many heat-related deaths, Brabble said Thursday. Immigrant rights advocates have warned that even as border crossings decrease, deaths are on the rise as increased border security forces people to choose more dangerous crossing routes. Border patrol officials have argued that more security is necessary to stop smugglers. According to a recent study by the Binational Migration Institute at the University of Arizona, more than 2,230 migrants have died in the state's desert area along the border in the past 22 years. In the border region of Pima County, Arizona, deaths of unidentified migrants in the desert have become so common the Medical Examiner's Office has helped create a website to track the deaths and assist family members searching for their loved ones' remains. On Thursday, a bipartisan group of senators announced a proposal to add 20,000 more border agents, complete 700 miles of fence along the boundary with Mexico, and deploy $3.2 billion in technology upgrades similar to equipment used by U.S. forces in Iraq and Afghanistan. The proposed amendment, negotiated by a group of senators from both parties known as the "Gang of Eight," is intended to ensure Senate passage of a major immigration reform bill with enough Republican support to persuade the GOP-controlled House to also take up the measure. Journalist Valeria Fernandez and CNN's Tom Cohen, Dana Bash and Ted Barrett contributed to this report.

SOLUTION: A border patrol spokesman says it's probable they are immigrants .
The bodies have not been identified, the Maricopa County Sheriff's Office says .
Activists say border deaths are on the rise as security forces more dangerous crossings .
Border patrol officials have argued that more security is necessary to stop smugglers .

PROBLEM: (CNN) -- Cristiano Ronaldo has urged his Real Madrid teammates to carry their recent impressive form into the New Year after they cut Barcelona's lead at the top of Spain's La Liga to two points. The Portugal international scored a spectacular goal as Real kept the pressure up on defending champions Barca with an emphatic 6-0 victory over Real Zaragoza. But Ronaldo does not want his colleagues to take their foot of the gas and keep the pressure on the Catalan side, who won the Club World Cup in Abu Dhabi, when the season resumes again on January 2 after the winter break. "It was important to seal the year with a victory, so we are happy about that. We must all now think of the New Year, which we should start as well as we've ended this one," Ronaldo told the club's Web site. "I'm working well and I want to carry on this way until the end of the season. I'm doing better every day. I missed two months and coming back was difficult, but things are working out for me." Real coach Manuel Pellegrini also paid tribute to Barcelona for an amazing 12 months in which they added the Club World Cup trophy to victory in La Liga, the Copa del Rey, Champions League and European and Spanish Super Cup titles. "What Barcelona have achieved is a great feat and hard to emulate. But there is also great merit in just being two points behind them on the table," he said. "We've played well away from home against the teams that earned the most points last year. Barcelona's excellent performances add to our own merit." Meanwhile, Hugo Sanchez become the fourth La Liga manager to lose his job his season after he was sacked by Almeria following their 2-0 away defeat to Espanyol which left them a point above the relegation zone. Almeria had lost eight of their 15 games in La Liga this season and the Mexican has been replaced by Constantin Galca, the coach of Almeria's B team, on a temporary basis.

SOLUTION: Cristiano Ronaldo has urged his Real Madrid teammates to carry their recent impressive form into the New Year .
Real Madrid cut the lead of defending champions Barcelona to two points after a 6-0 thrashing of Real Zaragoza.
Coach Manuel Pellegrini also paid tribute to Barcelona's amazing 12 months following their victory in the Club World Cup .

PROBLEM: GENEVA, Switzerland (CNN) -- The number of confirmed swine flu cases across the globe kept rising Friday, but some signs of hope emerged in the battle against the worldwide outbreak. Tourists sunbathe wearing surgical masks in the popular Mexican resort of Acapulco. The World Health Organization said Friday that the number of confirmed cases stood at 367 worldwide, including 141 in the United States and 156 in Mexico. Thirteen countries have confirmed cases, the organization said. Meanwhile, researchers worked to develop a vaccine for swine flu, which is also known as 2009 H1N1. The Centers for Disease Control and Prevention hopes to have a vaccine to manufacturers within a month, said Michael Shaw, lab team leader for the H1N1 response at the CDC. "We're doing the best we can as fast as we can," he said. Yet it would take four to six months from the time the appropriate strain is identified before the first doses become available, said Dr. Marie-Paule Kieny, WHO director of the Initiative for Vaccine Research. "Of course we would like to have a vaccine tomorrow. We would have wanted to have it yesterday," she said. "It's a long journey." She said there is "no doubt" that a vaccine can be made "in a relatively short period of time." The steps involved in producing a vaccine involve isolating a strain of the virus, which has already been done, and tweaking it so manufacturers can make a vaccine, Kieny said. The tweaked virus will be shipped to manufacturers, who will fine-tune it. Then come more tests before national regulatory agencies decide whether to approve a vaccine. As researchers work, at least one politician at the epicenter of the outbreak expressed optimism Friday. Authorities in Mexico are "beginning to see evidence that the [virus] might be letting up, and the number of people who have been hospitalized has leveled out in regards to people who are contagious, at least as of yesterday," Mexico City Mayor Marcelo Ebrard told reporters.  Watch how Mexican authorities are dealing with the outbreak » . "We do have a problem, but I say this so that we know where we are as a city after we have done all we have done, and in what direction we are heading and how much we have progressed. And what I can say is that we are heading in the right direction." The WHO said Mexico has 156 confirmed cases and nine deaths. Mexican authorities say they have confirmed 16 deaths and at least 358 cases, and they suspect more than 150 deaths may have been caused by the flu.  Watch Dr. Sanjay Gupta demystify pandemics » . The CDC gave the following state-by-state breakdown of the 141 confirmed H1N1 cases in the United States: Arizona, 4; California, 13; Colorado, 2; Delaware, 4; Illinois, 3; Indiana, 3; Kansas, 2; Kentucky, 1; Massachusetts, 2; Michigan, 2; Minnesota, 1; Nebraska, 1; Nevada, 1; New Jersey, 5; New York, 50; Ohio, 1; South Carolina, 16; Texas, 28; and Virginia, 2.  See where cases have been confirmed » . One death in the United States has been attributed to swine flu -- a toddler from Mexico whose family brought him to Texas for medical treatment. In a Cabinet meeting, President Obama on Friday praised the "extraordinary" government response to the virus but emphasized that "we also need to prepare for the long term." "Since we know that these kinds of threats can emerge at any moment, even if it turns out that the H1N1 is relatively mild on the front end, it could come back in a more virulent form during the actual flu season, and that's why we are investing in our public health infrastructure."  Go behind the scenes at the CDC » . He said there are indications from Mexico that "relatively young, healthy people" have died rather than people whose immune systems are compromised, and "that's why we're taking it seriously." "So I just want everybody to be clear that this is why this is a cause for concern, but not alarm. We are essentially ensuring that, in the worst-case scenario, we can manage this appropriately, government working with businesses and individuals, the private sector, and containing an outbreak, and that we can, ultimately, get through this." In addition to the confirmed H1N1 cases in Mexico and the United States, Canada has 34; Spain has 13; United Kingdom has 8; New Zealand and Germany each have 4; Israel has 2; Austria, China, Denmark, Netherlands and Switzerland each have one, according to the WHO.   Learn about the virus » . Hong Kong health officials said a patient who is being treated there arrived from Mexico on a China Eastern Airlines flight that stopped in Shanghai. Denmark did not provide further details. An additional 230 cases are being investigated in the United Kingdom, and Spain has 84 suspected cases. Australia, which has had no confirmed cases, was investigating 114.  View images of responses in U.S. and worldwide » . The effects in Mexico reflect the fear and concern across the globe, including in the United States, where schools and parents are taking precautions in academics, graduations and sports because of the flu. For example, 22 students Slippery Rock University in Pennsylvania who just returned from from a five-week trip to Mexico City will get their diplomas at a separate ceremony when they graduate Saturday. Texas school officials have postponed all interscholastic sports until at least May 11. And Alabama has stopped such competitions until at least Tuesday. The U.S. Department of Education said Friday that 433 public and nonpublic schools in 17 states had been closed because of the flu outbreak. U.S. Secretary of Education Arne Duncan noted in a news conference that the number is less than 1 percent of the nation's approximate 100,000 schools. Earlier Friday, United Flight 903 was diverted to Boston, Massachusetts, on Friday after a female passenger started complaining of "flu-like" symptoms on a Munich-to-Washington flight, Logan Airport spokesman Phil Orendella said. CDC officials at a news conference Friday were asked to compare the strain with the deadly 1918 virus. "What we have found by looking very carefully at the sequences of the new H1N1 virus is that we do not see the markers for virulence that were seen in the 1918 virus," said Nancy Cox, chief of the CDC's Influenza Division. However, she added, "We know there's a great deal that we do not yet understand about the virulence of the 1918 virus or other influenza viruses that have a more severe clinical picture in humans." CNN's Karl Penhaul, Diana Magnay, Jake Perez, Saeed Ahmed, Umaro Djau and Nicole Saidi contributed to this report.

SOLUTION:
NEW: Mexican government says 16 people have died from virus .
Virus has spread to 13 countries, with hardest-hit areas in the West .
U.S. Education Department says outbreak has closed 433 schools in 17 states .
Vaccine could be made "in a relatively short period of time," official says .