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: What golf course did Romero win his first senior title? Passage:Romero first played on the European Tour in 1985 and was a full member from 1988 to 2005. He has 8 tournament victories and seven top twenty placings on the Order of Merit. In 2002 he became the third oldest winner on the European Tour (behind Des Smyth and Neil Coles) when he won the Scottish Open just three days before his 48th birthday. Romero came fifth on the Order of Merit for 2002. Romero turned fifty in 2004, and just a few days later he finished in a tie for second at his first senior tournament, the Senior British Open. In 2005 he won his first senior title at the European Seniors Tour's Travis Perkins Senior Masters, and he won the Wentworth Senior Masters in both 2005 and 2006. In 2006, he lost in a playoff against Loren Roberts for the Senior British Open Championship and won a playoff against Lonnie Nielsen for the JELD-WEN Tradition for his first Champions Tour win and major. He was the Champions Tour's 2006 Rookie of the Year. He won the U.S. Senior Open, his second major, at The Broadmoor in Colorado Springs in 2008.
 Links: a. Senior Open Championship b. Wentworth Senior Masters c. PGA Tour Champions d. Lonnie Nielsen

Ex Output:
b


Ex Input:
Question: Where was Sale's first husband born? Passage:On June 21, 2012, Simpson married Canadian figure skater Jamie Salé, whom he had "known for years from the Edmonton skating scene". They had been paired as partners in late 2009 for the first season of the CBC show Battle of the Blades, which they won. Simpson and Salé have one daughter, Samantha Rae Simpson, born on July 7, 2013. Through this marriage, Simpson is also a stepfather to Salé's son Jesse Pelletier (born September 30, 2007), from her first marriage to skating partner David Pelletier. He also has three children from a previous marriage, including son Dillon, who was drafted by the Edmonton Oilers in the 4th round of the 2011 NHL Entry Draft and is currently a defenseman for the Bakersfield Condors.
 Links: a. David Pelletier b. Canadian Broadcasting Corporation c. David Pelletier d. Battle of the Blades (season 1)

Ex Output:
a


Ex Input:
Question: How many teams are in the league that Perić made his debut in during the 2012-13 season? Passage:Born in Aleksinac, Perić debuted for the first team of Radnički Niš at the age of 18. He made 6 Serbian First League caps for the next season. After Radnički relegated to the Serbian League East, Perić spent some period as a loaned player with local club Sinđelić. Returning in the club, he was mostly used as a reserve choice for experienced Zoran Vasković until the 2012–13 season, when got a chance from the 2nd fixture of the competition making his Serbian SuperLiga debut. He spent the rest of half-season as a first goalkeeper, and was nominated for the best player of the half-season by the fans choice. Later, after Aleksandar Kesić joined the club in the winter break off-season, Perić moved on the bench. He also played several matches before the end of season. Later, he was out of the team mostly time until the end of contact with Radnički, and spent mostly time as a loaned player in other clubs until 2015. In summer 2016, Perić returned in his home club.
 Links: a. Serbian SuperLiga b. Serbian SuperLiga c. FK Radnički Niš d. 2012–13 Serbian SuperLiga

Ex Output:

a