In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
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Question: (CNN) As the Summer Olympics in Rio de Janeiro, Brazil, officially kick off with the opening ceremony on August 5, here are some key facts and figures to celebrate the first Olympic Games hosted by a South American country. 4,600 Brazilian real: The cost of the most expensive opening ceremony ticket (about $1,400 as of this publication). The least expensive opening ceremony ticket is only sold in Brazil and costs 200 real (about $60). 10: Rio's opening ceremony budget is 10 times less than the total spent on the London 2012 opening ceremony. 12,000: Number of Olympic torchbearers. The torch will pass through all 26 Brazilian states and reach 90% of the Brazilian population.Two sports join the Games this year: golf and rugby sevens42 sport disciplines will be represented in all 
 Question:380,000: Number of foreign spectators expected to arrive in _ during the Games.

Answer: Rio de Janeiro


Question: A British national held hostage in Yemen has been freed in a 'military intelligence' operation, according to Foreign Secretary Philip Hammond. The Briton, who has been identified as Robert Douglas Semple, 64, was released by United Arab Emirates forces. The freed hostage had been working as a petroleum engineer in the Yemeni province of Hadramawt when he was kidnapped in February 2014. The UAE forces were based in Yemen's main port city of Aden, according to the state news agency WAM. The Yemeni agency reported that he had been held by al-Qaeda for 18 months. Mr Semple was taken to the Yemeni port city of Aden before being flown to Abu Dhabi by military plane on Saturday night, it added.Hostage identified as petroleum engineer Robert DouglasSemple, 64He was abducted in February 2014 while working in Hadramawt provinceForeign Secretary Philip Hammond made the announcement from TehranAbductions are common in Yemen, plagued by tribesmen and Al-Qaeda militants 
 Question:Abductions are frequent as armed tribesmen and al-_-linked militants take hostages in the hope of swapping them for prisoners or cash.

Answer: Qaeda


Question: Havana, Cuba (CNN) Hurricane Irma, which devastated much of the Caribbean in September, has claimed a new victim: Raul Castro's succession plans. On Thursday, Cuban officials said the island was still dealing with the aftermath of the killer storm and needed to postpone long-held plans for Castro, 86, to retire on February 24, 2018, when his second five-year term ends. It was to have been the first time that Cuba was ruled by a leader not named Castro since the 1959 revolution that swept Raul Castro's older brother Fidel Castro to power. The wrath of Irma, however, delayed the Communist-run island's single party elections process, which appoints the Cuban National Assembly that in turn selects Cuba's president.Cuba, dealing with Hurricane Irma aftermath, says Castro will retire in April instead of FebruaryCastro has indicated first Vice President Miguel-Diaz Canel has his blessing to be the next president 
 Question:"My second and last term will have concluded," Castro told Cuban lawmakers on Thursday, "and _ will have a new president."

Answer:
Cuba