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: In which country is the seaport city of Porto located where the wine received its name "port"? Passage:Port is produced from grapes grown and processed in the demarcated Douro region. The wine produced is then fortified by the addition of a neutral grape spirit known as aguardente to stop the fermentation, leaving residual sugar in the wine, and to boost the alcohol content. The fortification spirit is sometimes referred to as brandy but it bears little resemblance to commercial brandies. The wine is then stored and aged, often in barrels stored in a Lodge (meaning "cellar") as is the case in Vila Nova de Gaia, before being bottled. The wine received its name, "port", in the later half of the 17th century from the seaport city of Porto at the mouth of the Douro River, where much of the product was brought to market or for export to other countries in Europe. The Douro valley where port wine is produced was defined and established as a protected region, and the name Douro thus an official appellation, in 1756, making it the third oldest, after Chianti (1716) and Tokaj (1730).
 Links: a. Barrel b. Tokaji c. Vila Nova de Gaia d. Porto

Output: d


Input: Consider Input: Question: To what city did the team that Olsen played with later move? Passage:Merlin Jay Olsen (; September 15, 1940 – March 11, 2010) was an American football player, announcer, and actor. He played his entire 15-year professional football career in National Football League (NFL) as a defensive tackle with the Los Angeles Rams. He was selected to the Pro Bowl a record 14 straight times, missing selection only in the last year of his career. This record of 14 seasons selected to play in the Pro Bowl, consecutive or otherwise, is shared with current New England Patriots quarterback Tom Brady, former offensive lineman Bruce Matthews, former tight end Tony Gonzalez, and former quarterback Peyton Manning. A recipient of the 1961 Outland Trophy as the best lineman in college football, Olsen is a member of the Pro Football Hall of Fame and the College Football Hall of Fame. As an actor, he portrayed farmer Jonathan Garvey on Little House on the Prairie. After leaving that series, he starred in his own NBC drama, Father Murphy.
 Links: a. NBC b. Los Angeles Rams c. Tom Brady d. American football

Output: b


Input: Consider Input: Question: Did the player with a contract ending in 2008 renew with the same team? Passage:Most of the players have contracts beyond this end of season, but Deco, an important player, has his contract ending in 2008. The captain is still Carles Puyol, who is from Barcelona's youth system, plays in the first squad since 1999 and currently is the player with the most appearances (268). Currently, the highest scorer is Ronaldinho, with 80 goals. Also Ronaldinho, from August of this year, has a European passport. On mid-October, Samuel Eto'o received Spanish nationality, making him an EU player. The only non-EU player is Yaya Touré. Because Spain ratified the Cotonou Agreement in 2007, however, Touré is now considered an EU player, as his native country of Ivory Coast is a signatory to that agreement, and the 2003 Kolpak ruling extended the Bosman ruling to nations with an associate trading relationship with the EU.
 Links: a. Deco b. European Union c. FC Barcelona B d. Passports of the European Union


Output: a