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: Who was older when Heitler obtained his doctorate, Arnold Sommerfeld or Karl Herzfeld? Passage:In 1922, Heitler began his study of physics at the Karlsruhe Technische Hochschule, in 1923 at the Humboldt University of Berlin, and in 1924 at the Ludwig Maximilian University of Munich (LMU), where he studied under both Arnold Sommerfeld and Karl Herzfeld. The latter was his thesis advisor when he obtained his doctorate in 1926; Herzfeld taught courses in theoretical physics and one in physical chemistry, and in Sommerfeld's absence often took over his classes. From 1926 to 1927, he was a Rockefeller Foundation Fellow for postgraduate research with Niels Bohr at the Institute for Theoretical Physics at the University of Copenhagen and with Erwin Schrödinger at the University of Zurich. He then became an assistant to Max Born at the Institute for Theoretical Physics at the University of Göttingen. Heitler completed his Habilitation, under Born, in 1929, and then remained as a Privatdozent until 1933. In that year, he was let go by the university because he was Jewish.
 Links: a. University of Göttingen b. Ludwig Maximilian University of Munich c. Arnold Sommerfeld d. Arnold Sommerfeld

Ex Output:
c


Ex Input:
Question: Is the Philippine Sea part of the Pacific Ocean? Passage:Nueva Camarines is the name of a proposed new province of the Philippines to be created out of Camarines Sur in the Bicol Region of the island of Luzon. The proposed province would border Camarines Sur to the west, the Philippine Sea to the north, Albay to the south, and to the east the island province of Catanduanes across Maqueda Channel. Its capital is expected to be Tigaon if the bill is passed. House Bill 4820 which would create the province passed the House of Representatives of the Philippines with 229 votes in favor to one against in 2011 and is now under consideration by the Senate of the Philippines. However, at the end of 15th Congress, it failed to pass to the Senate. In the 16th Congress under then Representative Felix William Fuentebella, a bill is yet to be filed to repropose the creation of the province, due to lack of support from fellow Camarines Sur Representatives Maria Leonor Robredo and Salvio Fortuno. In the 18th congress under new Representative Arnulf Bryan Fuentebella.
 Links: a. Philippine Sea b. 15th Congress of the Philippines c. 15th Congress of the Philippines d. Philippine Sea

Ex Output:
a


Ex Input:
Question: How big is the city Donaldson was born in? Passage:Donaldson was born in Islington, London, and was an England schoolboy international before beginning his football career with Arsenal. He was a member of their 1971 FA Youth Cup-winning side, but never broke through to the first team. In June 1973, he transferred to Second Division club Millwall for £5,000. The team were relegated in 1975, and Donaldson helped them achieve promotion back to the Second Division in 1975–76, and made 258 appearances in all competitions over a six-and-a-half-year period. He acted as an emergency goalkeeper three times during his Millwall career. He spent the summer of 1979 with the Los Angeles Skyhawks of the American Soccer League, and on 5 February 1980, signed for Second Division Cambridge United for a fee of £50,000. He made 132 league appearances for Cambridge and was featured in a 2002 book, Cambridge United: 101 Golden Greats. In 1984, he moved on to Royston Town of the Isthmian League.
 Links: a. Isthmian League b. Islington c. Los Angeles Skyhawks d. Millwall F.C.

Ex Output:

b