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.

Example Input: Question: Which of the two who collaborated together in the Dark Knight Trilogy films is older? Passage:Michael Caine is an English actor who has appeared in over 130 films and has had multiple television appearances. Caine's acting career began in the 1950s, when he was cast in many small, often uncredited roles in British films. Caine gained recognition as one of the most famous actors of the 1960s through his breakthrough role in the film Zulu (1964). He then portrayed spy Harry Palmer in the films The Ipcress File (1965), Funeral in Berlin (1966) and Billion Dollar Brain (1967). He also had starring roles in The Italian Job and Battle of Britain (both 1969). His role in Sleuth (1972) led him to an Academy Award for Best Actor nomination. Caine has won a Best Supporting Actor Oscar for the films Hannah and Her Sisters (1986) and The Cider House Rules (1999). More recently, Caine has gained a new following through his collaborations with British-American filmmaker Christopher Nolan in the Dark Knight Trilogy films, as well as Inception (2010) and Interstellar (2014).
Links: a. Michael Caine b. Funeral in Berlin (film) c. Christopher Nolan d. Zulu (1964 film)
Example Output: a

Example Input: Question: How many people lived in Georgia the year the Meskhetian Turks were forced from the Meskheti region? Passage:The Meskhetian Turks first arrived in Azerbaijan at the end of the nineteenth century, and more followed in 1918-1920. However, migration to Azerbaijan increased dramatically after World War II when the Soviet Union was preparing to launch a pressure campaign against Turkey. Vyacheslav Molotov, then Minister of Foreign Affairs, demanded to the surrender of three Anatolian provinces (Kars, Ardahan and Artvin); thus, war against Turkey seemed possible, and Joseph Stalin wanted to clear the strategic Turkish population situated in Meskheti, located near the Turkish-Georgian border which were likely to be hostile to Soviet intentions. Thus, in 1944, the Meskhetian Turks were forcefully deported from the Meskheti region in Georgia and accused of smuggling, banditry and espionage in collaboration with their kin across the Turkish border. Nationalistic policies at the time encouraged the slogan: "Georgia for Georgians" and that the Meskhetian Turks should be sent to Turkey "where they belong". Joseph Stalin deported the Meskhetian Turks to Central Asia (especially to Uzbekistan), thousands dying en route in cattle-trucks, and were not permitted by the Georgian government of Zviad Gamsakhurdia to return to their homeland.
Links: a. Georgia (country) b. Georgia (country) c. Meskheti d. Georgia (country)
Example Output: a

Example Input: Question: Who has been playing baseball longer between the pitcher who struck out Ryan Ludwick and the catcher who threw out Cristian Guzman? Passage:In the eighth inning, Miguel Tejada singled, and with one out attempted to steal second base. Catcher Dioner Navarro made a poor throw to get Tejada, and the ball ended up in center field, allowing Tejada to advance to third base on the error. Tejada scored on a sacrifice fly by Adrian Gonzalez, and the NL retook the lead. In the bottom half of the inning, after Brian Wilson retired the first two batters, Billy Wagner gave up a single to Grady Sizemore. Sizemore proceeded to steal second base (one of a record six stolen bases by both sides), and pinch-hitter Evan Longoria hit a ground rule double to left field to tie the game once again. With Mariano Rivera in to pitch with one out in the ninth inning for the American League, Rivera struck out Ryan Ludwick and Navarro threw out Cristian Guzman as he attempted to steal second, thus ending the inning. Ryan Dempster struck out the side in the bottom of the ninth to force the game into extra innings.
Links: a. Mariano Rivera b. Cristian Guzman c. Cristian Guzman d. Ground rule double
Example Output:
a