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: Which of Messner's teachers at the University of Munich was older? Passage:After Meissner’s abitur at the Humanistisches Gymnasium, in 1910, he began the study of physics and mathematics at University of Tübingen. After three terms, he went to the University of Munich as a student of the experimentalist Wilhelm Röntgen and the theoretician Arnold Sommerfeld. After one year at Munich, he returned to Tübingen to be able to study spectroscopy with Friedrich Paschen. While still a student in 1914, Meissner was able to prove the existence of oxygen lines in the solar spectrum. He was awarded his doctorate in 1915, on a thesis with the title Interferometrische Wellenlängenbestimmung im infraroten Spektralbereich. In 1916 he became an assistant to Edgar Meyer at the University of Zurich, under whom he completed his Habilitation, in 1918, with the Habilitationsschrift title Untersuchungen des Neonspektrums. The following year, he married the Polish physicist Doctor Janka Kohn.
 Links: a. Habilitation b. Ludwig Maximilian University of Munich c. University of Tübingen d. Wilhelm Röntgen

Output: d


Input: Consider Input: Question: How long had the Chicago Cubs been a team when Mahaffey set a strikeouts record for his club? Passage:Mahaffey set a club record with 17 strikeouts in a game against the Chicago Cubs on April 23, 1961. Though he ended the season with an ERA of 4.10, and a record of 11–19 (leading the NL in losses), in 36 games, he was selected to represent the Phillies on the NL All-Star team. Mahaffey ended the season with a record of 19–14, and a 3.94 ERA, with a career high 177 strikeouts, in 41 games. He was selected again in 1962 for the NL All-Star team, finishing 26th in balloting for NL Most Valuable Player (MVP), despite leading the league in home runs allowed with 36, and earned runs allowed with 120. Mahaffey had a 7–10 record in 26 games with the Phillies, to go along with a 3.99 ERA. In , he finished the season with a record of 12–9, with an ERA of 4.52, in 34 games. The ill-fated 1964 team was in first place in the NL, with a 6-game lead, with just 12 games remaining in the season, before starting a 10-game losing streak that cost the team the pennant. Mahaffey pitched in two of the games in that infamous skid, losing a 1–0 game (the first of that losing streak) on a steal of home by Chico Ruiz of the Cincinnati Reds, and was taken out while winning 4-3 in a game against the Milwaukee Braves, in which Rico Carty hit a ninth-inning bases-loaded triple, plating all 3 runners, off of reliever Bobby Shantz, to win the game for the Braves, 6-4. was his last season in Philadelphia, which saw him finish with a 2–5 record, and an ERA of 6.21, in 22 games, mostly in relief.
 Links: a. Chicago Cubs b. 1964 Philadelphia Phillies season c. Atlanta Braves d. Chico Ruiz

Output: a


Input: Consider Input: Question: Which city had more citizens the year Yeo was born, Southampton or Winchester? Passage:Yeo was born in Southampton, England on 7 October 1782 to a naval victualling agent. Yeo was sent to an academy near Winchester for his formal education. Yeo joined the Royal Navy as a midshipman aboard at the age of 10, thanks to his patron, Admiral Phillips Crosby. In 1796, he was made acting-lieutenant and placed in command of the 16-gun sloop . He was made lieutenant permanently on 20 February 1797. The vessel was deployed to the West Indies, where Yeo contracted Yellow fever was ordered home to England to convalesce in 1798. By 1802, Yeo was first lieutenant aboard in the Adriatic Sea. He distinguished himself during the siege of Cesenatico in 1800, when thirteen merchant vessels were burned or sunk. Following the Peace of Amiens in 1802, Yeo was demoted to half-pay.
 Links: a. Winchester b. Midshipman c. Southampton d. West Indies


Output: c