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: How long after Markos' mission to the Pope did Martin V pass away? Passage:He first appears in Constantinople in 1401, qualified as an oikeios of the emperor. In 1417 he was possibly sent on a diplomatic mission to the Venetians in the Morea. In 1422 and again in 1429 he was sent by Emperor John VIII Palaiologos as an envoy to the Ottoman Sultan Murad II. At the time he had the relatively lowly rank of protovestiarites, but was quickly promoted to protostrator and then to the senior rank of megas stratopedarches, which he held already during his mission in 1430 to Pope Martin V. During his return from the mission to the Pope, on orders from the Emperor, he raised Thomas Palaiologos to the rank of Despot in the Morea. He led two more missions abroad, one in 1433 to Pope Eugene IV, and one in 1438 to Venice.
 Links: a. Ottoman Empire b. Constantinople c. Pope Martin V d. John VIII Palaiologos
Example Output: c

Example Input: Question: What was Michael Caine's first film role when his acting career began in the 1950s? 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. Michael Caine c. Funeral in Berlin (film) d. Inception
Example Output: a

Example Input: Question: When was the venue constructed where One Direction performed to a sold out show on 3 December 2012? Passage:As part of its promotion, One Direction performed the song on televised programmes and during their worldwide Take Me Home Tour (2013). One Direction performed the track on The Today Show at the Rockefeller Center on 13 November 2012, to a record crowd estimated at 15,000. "Kiss You" was included in the set list of the group's 3 December 2012 sold-out show at New York City's Madison Square Garden. One Direction delivered a performance of "Kiss You", in front of a video game-themed set, on the final of the ninth series of The X Factor UK on 10 December 2012. According to the Daily Mail, their "energetic rendition" of "Kiss You" proved that the group have an elusive quality. On 12 December 2012, the group also performed the number on the final of the second season of The X Factor USA. Considering One Direction the "franchise's biggest success story", an editor for The Huffington Post opined that the boy band's prominent presence on both the US and UK versions of The X Factor seemed fitting. Not only Take Me Home Tour, they also performance in Where We Are Tour (2014) & On the Road Again Tour (2015)
 Links: a. On the Road Again Tour b. Madison Square Garden c. Today (American TV program) d. The X Factor (American season 2)
Example Output:
b