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: 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

Ex Output:
d

Ex Input:
Question: When was the gunnery school David moved to in 1932 built? Passage:He was assigned as a midshipman on 1 May 1929 after finishing top of his class in five subjects. In 1930 he was assigned to the battleship Marlborough, part of the Third Battle Squadron; and the following year to the battlecruiser in September 1931 on which he served with fellow midshipman, and future vice admiral, Peter Gretton. While serving on the ship, Wanklyn was promoted to acting sub-lieutenant (the equivalent of an army second lieutenant) on 1 January 1932. Soon afterwards he moved to the naval gunnery school - HMS Excellent - at Whale Island, Portsmouth to learn more about naval navigation to qualify for his second ring at the rank of lieutenant. In February 1933 he moved to HMS Dolphin and was promoted to lieutenant on 1 February 1933.
Links: a. Excellent b. Battlecruiser c. Vice admiral d. Whale Island, Hampshire

Ex Output:
a

Ex Input:
Question: What countries did Lounge go to in the Southeast Asia cruise? Passage:Lounge entered on active duty with the United States Navy following graduation from the U.S. Naval Academy and spent the next nine years in a variety of assignments. He completed Naval Flight Officer training at Pensacola, Florida, went on to advanced training as a radar intercept officer in the F-4J Phantom II, and subsequently reported to Fighter Squadron 142 (VF-142) based at Naval Air Station Miramar, California. While with VF-142, he completed a nine-month Southeast Asia cruise aboard (participating in 99 combat missions in the Vietnam War) and a seven-month Mediterranean cruise aboard . In 1974, he returned to the U.S. Naval Academy as an instructor in the Physics Department. Lounge transferred to the Navy Space Project Office in Washington, D.C., in 1976, for a two-year tour as a staff project office. He resigned his regular Navy commission in 1978 and joined the Naval Air Reserve. While in the Naval Air Reserve, he served in Reserve Fighter Squadron 201. Later, he became a Lieutenant Colonel in the Texas Air National Guard, serving with the 147th Fighter Interceptor Group.
Links: a. Southeast Asia b. Mediterranean Sea c. Interceptor aircraft d. Marine Corps Air Station Miramar

Ex Output:
a