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: What is Lorraine Copeland's field of study? Passage:It was first studied by Lorraine Copeland and Peter Wescombe in 1965–1966. A wide variety of materials were recovered from the site and its immediate area that are now held in the Saint Joseph University in Beirut. Stone tools from the surface included numerous short, wide, sickle blades with fine denticulation or nibbling along with tanged arrowheads, scrapers, chisels, axes, burins, obsidian and a small green stone axe. Pottery resembled middle periods at Byblos and coloured similar to at Ard Tlaili with red or black washes. Both fine and coarse shards were found of jars with a variety of collared and flared necks and flat bases along with bow rims such as those found at Jericho. Vessels were decorated with stabbed and incised designs, finger pressed around the rim and smoothed by hand or with straw. A painted lattice pattern was detected on at least one piece. Comparisons were made with middle and late Neolithic periods at Byblos showing inhabitation from several phases. The site was also used in Bronze Age and Classical times and material from these phases has been found over a wide area around the site.
 Links: a. Beirut b. Lorraine Copeland c. Axe d. Arrowhead

Output: b


Input: Consider Input: Question: Did Oerter stay in Germany after he moved away from Bavaria? Passage:By the early 1890s he had moved away from Bavaria and, with his brother, was working in Duisburg. Together the brothers smuggled subversive anarchist literature into Germany from the Netherlands. Coming under increasing police pressure, and taking his queue from a number of other anarchist comrades in a similar predicament, early in 1892 he fled to the United States of America. On his arrival at New York he met up with the circle around Emma Goldman, Alexander Berkman, and politically like-minded comrades from Germany. Sepp Orter discovered in himself a talent for activism, turning out to have a flair for public speaking. During 1892 he was also the editor of the New York version of , published by the "Radical Workers' Association" ("Radikaler Arbeiter Bund") and the "Autonomy" group which also numbered among its members Josef Peukert. The stay in America was cut short, however. The authorities suspected that Oerter had somehow been involved in Alexander Berkman's attempt to assassinate a wealthy businessman called Henry Clay Frick. Those suspicions appear not to have been entirely unfounded. With financial assistance from Emma Goldman, Sepp Oerter returned to Germany. He travelled via London where he arrived in October, and where the editorial group publishing "Autonomy" gave him a mission to take printed material across Belgium to the German frontier in order to effect a clandestine introduction of the anarchist propaganda to Germany. Sepp Oerter was able to complete his mission with the help of his brother Fritz who had stayed behind when Sepp had escaped to America.
 Links: a. Josef Peukert b. Emma Goldman c. Emma Goldman d. Duisburg

Output: d


Input: Consider Input: Question: When was the station that was closed to pedestrians built? Passage:The Ritz Carlton, Westin Peachtree Plaza, Georgia-Pacific Building, SunTrust Plaza (where more than 60 people had to be relocated out of their offices), Equitable Building, and Georgia State University also had windows blown out (300 at Equitable alone), as did The Tabernacle (a former church with stained glass that is now a concert venue). The windows of the Westin continued to fall for days after the tornado, forcing police to keep several city blocks and MARTA's Peachtree Center station closed to pedestrians. The Georgia World Congress Center also sustained flooding while hosting a JROTC event and the Hinman Dental Meeting; Fox Sports Net took footage of a staircase in the new section of the complex that looked like a fountain with water cascading down it. The annual Atlanta Home Show and all other events were cancelled for the weekend in the GWCC complex, as was the Atlanta St. Patrick's Day Parade scheduled for the next day. WRAS FM at Georgia State University was off the air for two days, though it was not stated whether its studio or tower sustained damage, or if this was due to security or safety concerns, or power outages. The historic Rialto Theatre at GSU also sustained roof damage, which caused water damage inside.
 Links: a. SunTrust Plaza b. Peachtree Center station c. Westin Peachtree Plaza Hotel d. Equitable Building (Atlanta)


Output: b