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.

[EX Q]: (CNN) -- For the second time in six months, Henrique Capriles Radonski will be in an electoral fight for the presidency of Venezuela. His opponent is different this time, but the stakes may be even higher: What course will the South American country chart after the death of Hugo Chavez? In October, Capriles proved to be the strongest challenger the opposition ever fielded against Chavez, yet he still he lost to the charismatic leader by double-digits. But Chavez's battle with cancer kept him from being sworn in, and he died March 5. On Sunday, Capriles will be in a contest against Nicolas Maduro, the interim president and the man Chavez picked as his successor. Q&A: Venezuela's presidential election . At age 40, he has been a mayor, a parliament leader, and a governor of a major state who has been given a second chance to win the presidency. "I am seeking to win the confidence of all Venezuelans," Capriles said recently. "I want a united country. I want Venezuelans to join together (and) work together with a single goal." The most important issue, he says, is to tackle poverty. Generous social programs are a foundation of the government that Chavez headed, and Capriles has that he will not do away with them. But he has promised to end the large subsidies that Venezuela provides to Chavez allies. An attorney, Capriles was elected to parliament in 1998, when Venezuela had a bicameral legislature. He was just 25 years old at the time, but he quickly advanced to become the president of the Chamber of Deputies and then president of the entire Parliament. But the bicameral legislature was dissolved in 1999. The following year, Capriles was elected mayor of Baruta, which is located in the state of Miranda and is a suburb in the Caracas metropolitan area. He became mayor with more than 60% of the vote. In 2002, he become involved in violent anti-government demonstrations outside the Cuban Embassy and spent four months in jail. He was eventually released and cleared of any wrongdoing. He then was re-elected mayor with almost 80% approval in 2004. In 2008, he ran for governor of Miranda state and won. Capriles' grandparents were Polish Holocaust survivors, but he is a practicing Catholic, according to the Los Angeles-based Simon Wiesenthal Center.
[EX A]: Henrique Capriles Radonski is running for president for the second time in six months .
Hugo Chavez defeated him in October .
After Chavez's death, Capriles was tapped once again to represent the opposition .

[EX Q]: (CNN) -- Facebook will soon be using your Web browsing to help decide which advertisements you see. A new Facebook system will use your activity on other websites to send you what Facebook thinks are ads about your current interests. Advertisers will, in effect, be bidding to get their ads in front of you. Here's an example: Say a Facebook user visits a travel website and clicks on a page about a vacation package to Las Vegas. If an advertiser has bid on that kind of search, that user could then see ads for discounted trips to Vegas the next time they visit Facebook. "By bidding on a specific impression rather than a larger group, advertisers are able to show people more relevant ads while also running more efficient and effective campaigns," a Facebook spokeswoman said in a written statement. The site announced the new system, called Facebook Exchange, to marketers last week. It's expected to begin rolling out in the next couple of weeks. Real-time bidding is already widely used across the Internet. In a blog post, Mike Stiles of Atlanta-based social marketing company Vitrue compared the feature to Google's Ad Words, which pushes an advertiser's ad in front of users when they search for a keyword that advertiser has chosen. "The underlying principle is that users want relevant ads, advertisers don't want to waste money on misguided ads, and Google wants both users and advertisers to be real happy so they'll come back again and again," he wrote. Currently, Facebook ads are targeted based on users' profiles and the companies or other pages they "like." Stiles writes that model will still be available for advertisers, but the new one should be more specific. Facebook noted that users will be able to opt out of Exchange by going to the site's About Ads page, by clicking on an "X" that appears on the ads themselves or by blocking cookies on their Web browser. The company statement said Facebook won't share any user data with the advertisers and that no advertising controls that users currently have will go away. How do you feel about Facebook targeting ads? Jim Anderson, Vitrue's chief operating officer, said the new system probably won't appear dramatically different to the typical Facebook user. "It's not going to be discernible to most consumers," he said. "Most people won't notice any difference or, to the degree they can discern a difference, it will be 'Wow ... this is more relevant to me.'' " And while the "real time" nature of the new system will enhance relevance, it won't be perfect, according to Anderson. "It's possible you might not be served an ad until after you took that trip to Vegas," he said, referring to the previous example. "But without this kind of targeting, you might be served an ad for a trip to Miami, which you weren't considering anyway." As Web giants like Facebook and Google get better at harvesting user activity, using Web searches for advertising is becoming increasingly popular. According to research firm International Data Corporation, more than $5 billion in online advertising is expected to go to real-time bidding ads in the United States in 2015. That's 27% of what's predicted to be spent, up from less than 10% last year. Facebook, of course, is increasingly under pressure to demonstrate a sustainable advertising model since its stock went public last month. Anderson predicts the site will continue to diversify how its ads work in the coming months. It's sometimes a tricky prospect. It was just revealed that Facebook settled a lawsuit last month by the state of California over its "Sponsored Stories" feature. According to reports, Facebook paid $10 million to charity after five users claimed the site broke California law when it used their posts in the feature without paying them.
[EX A]: Facebook Exchange will use Web browsing to target ads .
Browser cookies will let advertisers hyper-focus their offers .
Facebook says users may opt out of the ad model .
"Real-time bidding" is already used by Google, others .

[EX Q]: Buenos Aires (CNN) -- Argentina's president is scheduled to temporarily hand over power Wednesday as she undergoes thyroid cancer surgery. Doctors were set to operate on President Cristina Fernandez de Kirchner at Austral Hospital, located about 60 kilometers (35 miles) outside Buenos Aires, the state-run Telam news agency reported. She will hand over power to Vice President Amado Boudou until January 24, officials have said. Supporters gathered outside the hospital Tuesday, posting banners and flags on a surrounding gate. Some set up camp for an overnight vigil. "There is nothing healthier than the love between the people and the president," one sign said, according to Telam. Recent medical tests uncovered papillary carcinoma in Fernandez's thyroid gland, presidential spokesman Alfredo Scoccimarro said last week. The cancer has not spread to her lymph nodes or grown beyond the thyroid gland, he said. Fernandez, 58, was sworn in for a second four-year term last month after she won re-election with more than 54% of the vote. She became Argentina's president in 2007. Her husband, Nestor Kirchner, was president from 2003-2007. He died in October 2010. During Fernandez's presidency, Argentina's economy has enjoyed sustained growth of about 8% annually. Papillary carcinoma is the most common type of thyroid cancer and has a high survival rate, according to the U.S. National Library of Medicine. More than 95% of adults with papillary thyroid carcinoma survive at least 10 years, according to a description on the library's website. Treatment includes surgery, radioactive iodine and medication, the library says. Possible complications in surgery can include damage to a nerve that controls the vocal cords or accidental removal of a gland that helps regulate blood calcium levels, according to the medicine library. Recently doctors have diagnosed several current and former South American leaders with cancer. Paraguayan President Fernando Lugo was diagnosed with non-Hodgkin's lymphoma in 2010. Venezuelan President Hugo Chavez announced that doctors had diagnosed him with cancer in June. He did not specify what kind of cancer he had, but after undergoing several rounds of chemotherapy, he said in October that he had been cured. Brazilian President Dilma Rousseff overcame cancer while she was a candidate for the office, and former Brazilian President Luiz Inacio Lula da Silva is undergoing treatment for throat cancer.
[EX A]:
Doctors are set to operate in a hospital outside Buenos Aires .
President Cristina Fernandez de Kirchner will hand over power until January 24 .
Medical tests uncovered papillary carcinoma in her thyroid gland .
Supporters gather outside the hospital, posting banners and flags on the gate .