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.

Input: Consider Input: Question: How old was Snow Chief in the 1986 Kentucky Derby race? Passage:Solis' first rode in the Kentucky Derby in 1983 on a longshot named Current Hope, and did not place in the money. He rode the Derby again in 1986 on Snow Chief, who had won the Santa Anita Derby and was the morning line favorite, but again finished well back. The horse and rider went on to with the Preakness Stakes that year, marking Solis' only win to date in an American Triple Crown race. He was third in the 1991 Derby on Mane Minister, and also third in the Belmont Stakes on the same horse. Solis finished second in the Kentucky Derby and third in the Preakness with Captain Bodgit in 1997, second in the Derby with Victory Gallop in 1998 and second in both the Derby and the Belmont with Aptitude in 2000. His first Breeders' Cup win was the 2000 Breeders' Cup Sprint on Kona Gold. He won two Breeders' Cup races in 2003 with Johar (who finished in a dead heat) in the Breeders' Cup Turf, and the Breeders' Cup Classic on Pleasantly Perfect, both trained by Richard Mandella. He ended 2003 ranked fourth nationally in purse earnings with a career-best $16,304,252.
 Links: a. Breeders' Cup Turf b. Santa Anita Derby c. Snow Chief d. Richard E. Mandella

Output: c


Input: Consider Input: Question: On what day did the season begin that Mark Sloan first appears? Passage:Mark first appears in season two, introduced as a highly respected otolaryngologist sub-specialized in plastic surgery and the childhood best friend of neurosurgeon Derek Shepherd (Patrick Dempsey). In his first appearance, he flirts with Meredith Grey, and Derek punches him in the face. Derek explains that Mark had an affair with his wife, Addison (Kate Walsh) while they were living in New York. Mark travels to Seattle, intent on convincing Addison to return with him to New York, but his offer is rejected and Derek declines to renew their friendship. Mark returns during season three at Addison's drunken behest, but she again rejects him once sober. Undeterred, Mark sells his successful private practice (which he previously shared with Derek) and takes over the plastics program at Seattle Grace Hospital. During Meredith's morphine rampage, Mark finds out about his nickname McSteamy which was given to him by her during his first trip to Seattle back when he attempted to get Addison back and earn Derek's friendship back. It is later revealed that Mark has at some point slept with all of Derek's sisters. Mark has a brief fling with Addison's friend, orthopedic surgeon Callie Torres (Sara Ramirez), and develops a friendship with Derek's girlfriend, intern Meredith Grey (Ellen Pompeo). It is revealed that after Derek left New York, Mark and Addison continued their relationship for two months, during which she conceived and aborted his child. Just weeks after moving to Seattle he quickly observes that Derek's true love was Meredith and tries to convince Addison that her marriage with Derek was over. Mark enters into a sixty-day abstinence pact with Addison, agreeing that if they can remain celibate for that time, Addison will give their relationship another chance. Addison ultimately breaks the pact by having sex with intern Alex Karev (Justin Chambers), and soon thereafter departs from Seattle to work in Los Angeles.
 Links: a. Grey's Anatomy (season 2) b. Grey's Anatomy (season 2) c. Kate Walsh (actress) d. Callie Torres

Output: a


Input: Consider Input: Question: How old was John Still the year that Marriott got a red card for making a gesture to a fan? Passage:Marriott signed for League Two club Luton Town on a one-year contract on 20 May 2015. He made his debut as a 76th-minute substitute for Danny Green in a 1–1 draw away to Accrington Stanley on the opening day of 2015–16. Marriott scored his first goals for Luton in the following match, a 3–1 win at home to newly promoted Championship club Bristol City in the League Cup first round. This performance saw him named in the League Cup team of the round. Marriott signed a contract extension with Luton on 25 August until June 2017, with triggers to extend it for a further two years. He was shown a red card for making a gesture to the Leyton Orient fans in Luton's 2–1 win in the Football League Trophy on 1 September. Luton manager John Still, who was adamant he didn't deserve the red card said, "He shouldn't have done it but the punishment didn't fit the crime." Marriott scored a brace in consecutive substitute appearances against AFC Wimbledon and Hartlepool United, which resulted in two wins in a week to increase his tally for the season to six goals. He went on to score twice in 20 appearances, including a goalless drought of 10 matches, before scoring a consolation goal in a 4–1 defeat away to AFC Wimbledon on 13 February 2016. A return to form saw Marriott score four goals in five matches and increased his tally for the season to 12 goals after a 1–0 win away to Leyton Orient on 5 March. Marriott was named Luton Town Player of the Season, voted for by the club's supporters, and joint winner of the Luton Town Young Player of the Season award along with Cameron McGeehan on 1 May, chosen by the Luton Town management team. His fourth brace of 2015–16 in a 4–1 win at home to Exeter City on 7 May saw him finish the season as Luton's top scorer with 16 goals in 44 appearances. Marriott signed a new three-year contract with Luton on 20 July.
 Links: a. John Still (footballer) b. Luton Town F.C. Player of the Season c. Luton Town F.C. Player of the Season d. Exeter City F.C.


Output: a