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].

Q: (CNN) A new study lends support to one of the biggest fears about Zika virus: It might increase the risk of the rare neurological syndrome Guillain-Barre. Years before Zika virus first appeared in Latin America, it spread from Africa and Asia to Pacific islands. From 2013 to 2014, French Polynesia had 32,000 suspected cases of Zika virus. During this same period, there was also an uptick in cases of Guillain-Barre. Researchers in French Polynesia and Europe looked at those 42 cases of Guillain-Barre in the Pacific Island nation between October 2013 and April 2014. They asked whether there was any evidence these patients had been exposed to Zika virus.A study finds evidence that people in French Polynesia affected by Guillain-Barre were exposed to Zika virusResearchers estimate that about 1 in 4,000 Zika infectious could lead to the rare neurological syndromeGuillain-Barre causes muscle weakness and paralysis, and many patients take weeks to months to recover 
 Question:The researchers estimate, based on the rates of _ and Guillain-Barre in French Polynesia, that one in 4,000 people infected with Zika could develop the neurological syndrome.

A: Zika
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Q: (CNN) Mariella Azzato sees her staff thinning almost daily in Venezuela. Over 430 professors, assistants and faculty have left the University of Simon Bolivar, in Caracas, since 2015, according to Azzato, the university's vice rector of administration. The public university is widely considered one of Venezuela's best, yet more than a third of the faculty have left in three years. The vast majority of professors are leaving in search of better lives in other countries as Venezuela dives deeper into an economic and humanitarian crisis punctuated by a government many, including President Trump, deem a dictatorship. "A moment is going to arrive when there's isn't anyone," Azzato laments. "There's an exodus of the most talented professors to other countries."Professors seek better lives in other countries as Venezuela dives deeper into crisisOver 39,000 Venezuelans sought asylum around the world in the first half of this year, UN report says 
 Question:Some _ cross the border to buy food, toiletries and other essentials and then return the same day to Venezuela.

A: Venezuela
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Q: Serena Williams brushed off some serving troubles before cruising to a 6-4, 6-3 win over Elina Svitolina on Saturday and will meet Simona Halep in the Western & Southern Open final. Williams's serve was off for a second consecutive match in Cincinnati and she committed 34 unforced errors but the World No.1 was never under serious threat from the 14th-seeded Ukrainian. The American will bid to complete a calendar grand slam at her home U.S. Open from Aug. 31, a pursuit that kept her early struggles in perspective on Saturday. 'I wanted to not worry about this match, but worry about the next few matches and next few weeks and start playing better for that,' Williams said in an on-court interview.World No 1 committed 34 unforced errors in win over Elina SvitolinaSerena Williams defeated the Ukrainian 6-4, 6-3 to reach the finalSimona Halep crushed Jelena Jankovic 6-1, 6-2 in the later semi-final 
 Question:Williams laced two straight backhand winners to break _'s serve to move to 3-1 in the second set.

A:
Elina Svitolina
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