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: How many people attended the conference held near Berlin in January 1942? Passage:Following the invasion of Poland in 1939 most of the 3.5 million Polish Jews were rounded up and put into newly established ghettos by Nazi Germany. The system was intended to isolate the Jews from the outside world in order to facilitate their exploitation and abuse. The supply of food was inadequate, living conditions were cramped and unsanitary, and the Jews had no way to earn money. Malnutrition and lack of medicine led to soaring mortality rates. In 1941, the initial victories of the Wehrmacht over the Soviet Union inspired plans for the German colonisation of occupied Poland, including all territory within the new district of General Government. At the Wannsee Conference held near Berlin on 20 January 1942, new plans were outlined for the genocide of the Jews, known as the "Final Solution" to the Jewish Question. The extermination programme was codenamed Aktion Reinhard in German, to differentiate it from the Einsatzgruppen mass killing operations in territories conquered by Nazi Germany, in which half a million Jews had already been annihilated.
 Links: a. Einsatzgruppen b. Wannsee Conference c. Operation Reinhard d. General Government

Ex Output:
b


Ex Input:
Question: How many other Blackhawks made the 2015 All-Star game? Passage:During the 2014–15 season, Kane emerged as one of the NHL's leading scorers. He was elected to the 2015 NHL All-Star Game in Columbus, Ohio. He scored 64 points (27 goals and 37 assists) through the regular season. He injured his left clavicle on February 24, 2015, after he was cross-checked into the boards while stumbling towards the ice by Alex Petrovic in a game against the Florida Panthers. Kane underwent surgery and was expected to miss 12 weeks. At the time of his injury, he was leading the NHL in points. However, he recovered earlier than initially projected and returned to the Blackhawks at the start of the 2015 playoffs. Chicago head coach Joel Quenneville moved Kane to the Blackhawks' top line alongside Jonathan Toews and Brandon Saad after the Anaheim Ducks took a 3–2 game lead in the Western Conference Finals. The trio combined for nine points over the final two games and propelled the Blackhawks to the Stanley Cup Finals. Kane helped the Blackhawks defeat the Tampa Bay Lightning by assisting on Duncan Keith's game-winning goal in Game 6 and scoring an insurance goal for his third Stanley Cup championship in six years. Kane finished the playoffs with 11 goals and 12 assists, tying the Lightning's Tyler Johnson with a playoff-high 23 points.
 Links: a. 2015 National Hockey League All-Star Game b. 2015 Stanley Cup playoffs c. 2015 Stanley Cup playoffs d. Alex Petrovic

Ex Output:
a


Ex Input:
Question: How many lakes are included in the group that the treaty territory extends between? Passage:A Dish With One Spoon, also known as One Dish One Spoon, is a law used by indigenous peoples of the Americas since at least 1142 CE to describe an agreement for sharing hunting territory among two or more nations. People are all eating out of the single dish, that is, all hunting in the shared territory. One spoon signifies that all Peoples sharing the territory are expected to limit the game they take to leave enough for others, and for the continued abundance and viability of the hunting grounds into the future. Sometimes the Indigenous language word is rendered in English as bowl or kettle rather than dish. The Dish With One Spoon phrase is also used to denote the treaty or agreement itself. In particular, a treaty made between the Anishinaabe and Haudenosaunee nations at Montréal in 1701, as part of the Great Peace of Montreal is usually called the Dish With One Spoon treaty and its associated wampum belt the Dish With One Spoon wampum. The treaty territory includes part of the current province of Ontario between the Great Lakes and extending east along the north shore of the St. Lawrence River up to the border with the current province of Quebec. Some claim it also includes parts of the current states of New York and Michigan.
 Links: a. Michigan b. Great Lakes c. Great Peace of Montreal d. Montreal

Ex Output:

b