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 the winner of the 18th season of Celebrity Big Brother when they won? Passage:The third series of the show began on 11 August 2015. The official list of cast members was released on 14 July 2015. This series was filmed in Cancun, Mexico, making this the first series to be filmed outside of Europe. They include four boys: Graham Griffiths, Jayden Robins, Kirk Norcross and Stephen Bear, and four girls: Amy Paige Cooke, Laura Alicia Summers, Megan McKenna and Megan Rees. With the announcement of the line-up it was confirmed that former Geordie Shore cast member and star of the first series, Vicky Pattison, would be making her return as an ex alongside Series 2 star Rogan O'Connor. The Only Way Is Essex cast member Kirk Norcross was also confirmed to be taking part in the series, with his ex-fiancée and Celebrity Big Brother star Cami-Li featuring as his ex. Star of Magaluf Weekender Jordan Davies was also revealed to be taking part in the series, also featuring as an ex. Megan McKenna and Jordan later returned for the fourth series. On 5 January 2016, cast member Megan McKenna entered the Celebrity Big Brother house to compete in the seveneeth series, and on 28 July 2016, Stephen Bear entered the house to compete in the eighteenth series where he left as the winner. Jordan Davies made another return to the show, this time during the fifth series with Jemma and Bear, and Holly also returning as an ex again. In August 2017, both Jemma Lucy and Jordan Davies took part in the twentieth series of Celebrity Big Brother.
 Links: a. Stephen Bear b. Stephen Bear c. The Only Way Is Essex d. Ibiza Weekender

Output: a


Input: Consider Input: Question: How many President's children have lived in the White House? Passage:Within weeks, many Americans could recite favorite lines from the record, including "the rubber schwan [swan] is mine", and "move ahead...with great vigah [vigor]", the latter lampooning the President's own words. The album poked fun at Kennedy's PT-109 history; the rocking chairs he used for his painful back; the Kennedy clan's well-known athleticism, football games and family togetherness; children in the White House; and Jackie Kennedy's soft-spoken nature and her redecoration of the White House; and many other bits of knowledge that the public was eager to consume. Kennedy himself was said to have given copies of the albums as Christmas gifts, and once greeted a Democratic National Committee group by saying, "Vaughn Meader was busy tonight, so I came myself." According to UPI reporter Merriman Smith, during a Cabinet meeting Kennedy played the entire record for everyone. At one press conference, Kennedy was asked if the album had produced "annoyment (sic) or enjoyment." He jokingly responded, "I listened to Mr. Meader's record and, frankly, I thought it sounded more like Teddy than it did me. So, now he's annoyed."
 Links: a. Child b. Rocking chair c. Sport d. Ted Kennedy

Output: a


Input: Consider Input: Question: In what country did Filanovsky win bronze in the all-around in November 2014? Passage:In 2014, Veinberg Filanovsky finished 7th in all-around at the 2014 Corbeil-Essonnes World Cup, and qualified to all four event finals for the first time in her World Cup competitions. On May 30–June 1, she competed at the 2014 Minsk World Cup. On June 10–15, she competed at the 2014 European Championships and finished 12th in the all-around final. On September 5–7, at the 2014 World World Cup Final in Kazan, Russia, Veinberg Filanovsky finished 9th in all-around behind Neta Rivkin, and qualified to one event final, finishing 7th in clubs. On September 22–28, Veinberg Filanovsky (along with teammates Neta Rivkin and Martina Poplinsky) represented Israel at the 2014 World Championships where Team Israel finished in 4th place. She finished 12th in the all-around finals behind Kseniya Moustafaeva of France. On October 18–20, Veinberg Filanovsky competed at the 2014 Grand Prix Berlin and won the all-around silver behind Russia's Maria Titova, while in event finals she won silver medals in hoop, clubs and ribbon. On November 1–3, Veinberg Filanovsky won the all-around bronze at the 2014 Grand Prix Brno behind compatriot Neta Rivkin. In November 14–16, at the 2014 Grand Prix Final in Innsbruck, Austria, Veinberg Filanovsky finished 4th in the all-around behind Bulgaria's Neviana Vladinova. In event finals, she won silver in ball and two bronze (clubs, ribbon).
 Links: a. Neta Rivkin b. Rhythmic Gymnastics Grand Prix c. Rhythmic Gymnastics Grand Prix d. Rhythmic Gymnastics Grand Prix


Output: b