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) When Peter MacDonald, Fleming Begaye and Thomas Begay joined the elite fraternity of Navajo Code Talkers during World War II, they had no idea what they were getting into. That was by design. The top-secret program they joined wouldn't even be declassified until more than two decades later -- long after the secret Navajo code language had played a vital role in the American war effort. All they knew at the time was that the Marines were recruiting and needed help from the Navajo people. "So we all volunteered. That's how he went in, that's how he went in, that's how I went in," said MacDonald, now 90, of his two comrades. MacDonald, Begaye and Begay were at the White House on Monday to receive praise for their service.The Navajo Code Talkers used their native language to invent a secret military codeThe code was vital to the US victory in the Pacific in World War II 
 Question:But the Navajo language's syntax and linguistics are particularly tricky for non-_, and it is not written.

A: Navajo Code Talkers
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Q: Ed Balls, right, has told friends that he does not think that Ed Miliband left, can be Prime Minister Ed Balls has told friends that Ed Miliband is not up to the job and hasn’t ‘grown’ into the leadership since taking over in 2010, a leading Labour-supporting magazine claimed last night. In a profile of the Shadow Chancellor, the New Statesman magazine said Mr Balls does not believe Mr Miliband has the credentials to lead his party. One Labour MP told the magazine that Mr Balls confided in him during Labour’s 2010 leadership contest that only he and David Miliband were qualified to take on the leadership, saying: ‘There are two people who are up this job – one’s David Miliband and one’s me.’Senior Labour figures now doubt Ed Milliband can win the General ElectionShadow Chancellor Ed Balls doubts Mr Miliband has the leadership skillsThe two Labour heavyweights are seen to be drifting apartMr Balls has hinted he would back his wife as leader if Labour lose in MayScroll down for video 
 Question:He said: ‘I’m the _ and we’re working really closely together on our plans, not just for the election but for government.

A: Shadow Chancellor
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Q: Lewis Hamilton has paid tribute to his team-mate Nico Rosberg after Mercedes celebrated successive team championships on Monday. Both Hamilton, who has one hand on a third Formula One title after his victory in Russia, and Rosberg flew in to the team's headquarters in Brackley and Brixworth to toast Mercedes' constructors' triumph with their 1,100-strong staff. But for Rosberg, the celebrations would have been bittersweet after he retired from Sunday's race at Sochi's Olympic Park with a mechanical issue. The German will now be eliminated from this year's championship battle if Hamilton outscores him by a mere two points at the next race in Austin in a fortnight's time.Mercedes were crowned constructors' champions following Russian GPLewis Hamilton won in Sochi and is closing in on his third drivers' titleThe Briton paid tribute to his team-mate Nico Rosberg during celebrations 
 Question:He is 66 points ahead of Sebastian Vettel and 73 points clear of _ with only four races remaining.

A:
Nico Rosberg
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