In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.

Ex Input:
Question: In what state did McAtee play professional hockey in the NHL? Passage:Norman Joseph McAtee (June 28, 1921 – August 25, 2010) was a professional ice hockey player who played 13 games in the National Hockey League with the Boston Bruins. Born in Stratford, Ontario, he and his brother Jud played together in junior ice hockey with the Oshawa Generals during the years when the Generals dominated the Ontario Hockey League, winning championships with them in 1938–39. 1939–40 and 1940–41. At the end of the 1941 season, Norm joined his brother by signing as a free agent with the Detroit Red Wings in the NHL. However, beginning in 1942 and lasting throughout World War II, Norm became a flying officer in the Royal Canadian Air Force. After his discharge in 1945, he teamed with his brother in the Red Wings farm system before the two of them were traded to the Chicago Blackhawks for Doug McCaig in December 1945. Just over a month later, Chicago traded him to Boston for Bill Jennings, and Norm joined the Bruins for 13 games, recording one assist. After that, he finished his career in the minor leagues, ending as player-coach with the Troy Bruins in Troy, Ohio from 1951 to 1954.
 Links: a. Troy, Ohio b. Doug McCaig c. Royal Canadian Air Force d. National Hockey League

Ex Output:
d


Ex Input:
Question: What age bracket plays for the Real Madrid's youth system? Passage:Casillas began his career in Real Madrid's youth system, known as La Fábrica, during the 1990–91 season. On 27 November 1997, at age 16 and still a junior, he was first called up to the senior team squad to face Rosenborg in the UEFA Champions League, although he remained on the bench throughout. After spending a season with the C-team in the fourth tier, during which they won their regional group, he came into contention as the club's first-choice between the posts. In starting the 1999–2000 UEFA Champions League group stage fixture against Olympiakos on 15 September 1999, he became the youngest goalkeeper ever to feature in the competition at the time, aged 18 years and 177 days; a record which was only broken in October 2017 by Mile Svilar. Three days earlier, Casillas had made his La Liga debut in a 2–2 draw against Athletic Bilbao at San Mamés Stadium. In May 2000, he became the youngest ever goalkeeper to play in and win a Champions League final when Real Madrid defeated Valencia 3–0, just four days after his 19th birthday.
 Links: a. Olympiacos F.C. b. Real Madrid CF (youth) c. La Fábrica d. Real Madrid CF (youth)

Ex Output:
b


Ex Input:
Question: Is the capital of Moldova in Orhei district? Passage:Lazo was born in the village of Piatra, Orhei, now in Orhei district, Moldova. He was of boyar origin. In 1917, he was a cadet at the Imperial Russian military academy when he joined the Bolshevik forces and was entrusted with several missions in Siberia during the Russian Civil War. In March–August 1918 he was a commander of the Zabaykalski (trans-Baikalan) Front, and fought against Ataman Grigory Semyonov. Later he fought in Bolshevik partisan units in the Vladivostok and Partizansk areas, commanding the Red Army during the Suchan Valley Campaign against American forces. On January 31, 1920 the Bolsheviks took power in Vladivostok, but on April 5, 1920 Lazo and other commanders were arrested by Japanese troops. Then, Lazo disappeared, along with Vsevolod Sibirtsev and Alexey Lutski. Reportedly they were shot shortly after, but the exact details of the execution have never been known yet. It is widely believed that the Japanese or Cossacks of the White movement burned them in the firebox of a steam engine in Muravyevo-Amurskaya (currently Lazo) station. 
 Links: a. Suchan Valley Campaign b. White movement c. Moldova d. Bolsheviks

Ex Output:

c