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: Who is the mayor of the city that Delta Connection ended service to on May 1, 2008? Passage:In later years, Continental Express continued to serve the airport with nonstop regional jet flights to Cleveland while Continental Connection was operating nonstop turboprop flights to Albany, NY; however, both services ended in 2005. Spirit Airlines scheduled flights to several Florida cities and Detroit, before moving to LaGuardia Airport in 2001; in May 2008 the airline resumed service to Fort Lauderdale from MacArthur only to drop it soon after. Delta Express, which had nonstops to Orlando and Fort Lauderdale, dropped MacArthur Airport in 2003 after a decline in traffic. Delta Connection regional jet service to Atlanta flown by Atlantic Southeast Airlines (ASA) on behalf of Delta Air Lines ended on May 1, 2008 following a mid-April announcement that Delta and Northwest Airlines were planning to merge – a move that led to changes for the merged airline.
 Links: a. Spirit Airlines b. Delta Air Lines c. Spirit Airlines d. Atlanta

Output: d


Input: Consider Input: Question: How many people attended the conference held near Berlin in January 1942? Passage:Following the invasion of Poland in 1939 most of the 3.5 million Polish Jews were rounded up and put into newly established ghettos by Nazi Germany. The system was intended to isolate the Jews from the outside world in order to facilitate their exploitation and abuse. The supply of food was inadequate, living conditions were cramped and unsanitary, and the Jews had no way to earn money. Malnutrition and lack of medicine led to soaring mortality rates. In 1941, the initial victories of the Wehrmacht over the Soviet Union inspired plans for the German colonisation of occupied Poland, including all territory within the new district of General Government. At the Wannsee Conference held near Berlin on 20 January 1942, new plans were outlined for the genocide of the Jews, known as the "Final Solution" to the Jewish Question. The extermination programme was codenamed Aktion Reinhard in German, to differentiate it from the Einsatzgruppen mass killing operations in territories conquered by Nazi Germany, in which half a million Jews had already been annihilated.
 Links: a. Einsatzgruppen b. Wannsee Conference c. Operation Reinhard d. General Government

Output: b


Input: Consider Input: Question: How many people received the award given by the Generalitat de Catalunya before Zaragoza? Passage:Federico Mayor Zaragoza obtained a Ph.D. in pharmacy from the Complutense University of Madrid in 1958. In 1963 he became professor of biochemistry at the School of Pharmacy of the University of Granada, and in 1968 was elected rector of that university, a post he held until 1972. The following year he was appointed professor in biochemistry at the Autonomous University of Madrid. In 1974 he co-founded the Severo Ochoa Molecular Biology Centre at the Autonomous University of Madrid and the Spanish High Council for Scientific Research. The main focus of Professor Mayor's scientific research has been on molecular brain disease, and he was responsible for drawing up the Spanish National Plan for Mental Health Prevention. He is a member of the Club of Rome, the Club of Budapest, a founder member of the Issyk-Kul Forum. In 2005 he received the Prize Creu de Sant Jordi from the Generalitat de Catalunya. He is an honorary member of several scientific societies and a member of several academies, among them, the World Academy of Art and Science. He has also received several honorary doctorates (Honoris Causa). He is honorary president of the University of Granada.
 Links: a. Creu de Sant Jordi b. Spanish National Research Council c. University of Granada d. Spanish National Research Council


Output: a