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. Among the entities, try to find the best entity that is most likely to fill in "_" and classify the answers based on options.

Ex Input:
(CNN) Though many individuals likely contributed to the President's decision to fire FBI Director James Comey, one notable one may have been Roger Stone, a 64-year-old close friend of Donald Trump and central figure in the FBI investigation into Trump campaign ties to Russia. In the middle of the Watergate scandal, Stone, who engaged in dirty tricks during Richard Nixon's 1972 campaign, was discovered to have hired a Republican operative to infiltrate the George McGovern campaign and was subsequently fired from his job. After the President's resignation, Stone remained an ardent Nixon apologist and loyalist. He even had the man's face tattooed on his back and devoted his life to ruthless, anything-goes politics (or political consulting, as you may know it). Stone's motto was and continues to be: "Admit nothing, deny everything, launch counterattack." And anyone who has watched Trump closely over the years would think it was his personal slogan, too.Michael D'Antonio: Roger Stone has undoubtedly influenced President Trump's decision to fire James ComeyAs an old friend and political adviser, Stone has taught Trump be ruthless -- particularly when protecting himself from attackTherefore Comey, who was leading the investigation into Trump campaign ties to Russia, had to be taken out, writes D'Antonio 
 Questions:Stone was introduced to _ in the 1980s by the notorious Roy Cohn. (A) CNN (B) FBI (C) James Comey (D) Roger Stone (E) Donald Trump (F) Russia (G) Watergate (H) Stone (I) Richard Nixon (J) Republican (K) George McGovern (L) Nixon (M) Michael D'Antonio (N) Comey (O) D'Antonio

Ex Output:
(E)


Ex Input:
Andy Murray has faced a tricky transition in recent weeks between hard and clay courts as he tries to balance his preparations for the ATP World Tour Finals at The O2 and the Davis Cup final in Belgium. After four days of training on clay at London’s Queen’s Club this past week, Murray is now back on hard courts as he gets set to open his World Tour Finals campaign against Spaniard David Ferrer on Monday afternoon. Sportsmail was granted the first hit on the freshly-laid court at The O2 as Sky Sports pundit and Murray’s ex-coach Mark Petchey explained the issues involved in changing surfaces which his former charge will have to deal with over the next fortnight.Andy Murray is competing in this week's ATP World Tour FinalsThe world No 2 is also gearing up for the Davis Cup final in BelgiumMurray has flitted back and forth between hard and clay courts recentlyMark Petchey explains the difficulties involved in switching surfacesSee more of the latest news and updates on Andy Murray 
 Questions:That again is something he is going to have to contend with during the _. (A) Andy Murray (B) ATP World Tour Finals (C) The O2 (D) Davis Cup (E) Belgium (F) London (G) Murray (H) World Tour Finals (I) Spaniard (J) David Ferrer (K) Sportsmail (L) Sky Sports (M) Murray’s (N) Mark Petchey (O) No 2

Ex Output:
(B)


Ex Input:
(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 
 Questions:Those 29 _ created more than 200 new Navajo words for military terms and committed them to memory. (A) Peter MacDonald (B) Fleming Begaye (C) Thomas Begay (D) Navajo Code Talkers (E) World War II (F) American (G) Marines (H) MacDonald (I) Begaye (J) Begay (K) White House (L) US (M) Pacific

Ex Output:

(D)