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: Which of the seas that the Sibiryakov sailed to was larger? Passage:A. Sibiryakov sailed on 28 June 1932 from the Krasny (previously Sobornoy) docks in Arkhangelsk, crossed the Kara Sea and chose a northern, unexplored way around Severnaya Zemlya to the Laptev Sea. In September, after calling at Tiksi and the mouth of the Kolyma, the propeller shaft broke and the icebreaker drifted for 11 days. However, A. Sibiryakov crossed the Chukchi Sea using improvised sails and arrived in the Bering Strait in October. A. Sibiryakov reached the Japanese port of Yokohama after 65 days, having covered more than in the Arctic seas. This was regarded as a heroic feat of Soviet polar seamen and Chief of Expedition Otto Schmidt and Captain Vladimir Voronin were received with many honors at their return to Russia.
 Links: a. Arkhangelsk b. Tiksi c. Kara Sea d. Kolyma

Ex Output:
c


Ex Input:
Question: How many soldiers were killed in the battle that Philippe de Mézières was knighted after? Passage:Philippe belonged to the poorer nobility. At first, he served under Luchino Visconti in Lombardy but within a year he entered the service of the husband of Joanna I of Naples, Andrew, Duke of Calabria, who was the son of the King Charles I of Hungary. Andrew was assassinated very soon in September 1345. In the autumn of that year, Philippe set out for the East in the French army. After the Battle of Smyrna in 1346 he was made a knight, and when the French army was disbanded, he made his way to Jerusalem. He realized the advantage which the discipline of the Saracens gave them over the disorderly armies of the West, and conceived the idea of a new order of knighthood, but his efforts proved fruitless. The first sketch of the order was drawn up by him in his Nova religio passionis (1367–1368; revised and enlarged in 1386 and 1396). From Jerusalem he found his way in 1347 to Cyprus to the court of Hugh IV, where he found a kindred enthusiast in the king's son, Peter of Lusignan, then count of Tripoli; but he soon left Cyprus, and had resumed his career as a soldier of fortune when the accession of Peter to the throne of Cyprus (Nov. 1358) and his recognition as king of Jerusalem induced Philippe to return to the island, probably in 1360, when he became chancellor.
 Links: a. Peter I of Cyprus b. Luchino Visconti (died 1349) c. Smyrniote crusades d. Cyprus

Ex Output:
c


Ex Input:
Question: In which state did Cook win a competition that caught the attention of the opera world? Passage:It wasn't until the early 1970s when Cook won a prize in an important singing competition in Chicago, that she drew the attentiont of the opera world. She made her international opera debut in 1971 singing Zerbinetta in Richard Strauss's Ariadne auf Naxos touring with the Glyndebourne Festival Opera. In 1972 she joined the roster at the Theater Bremen as one of their principal sopranos, where she remained until 1975 and continued to perform as a guest until 1980. She appeared there and in other German opera houses in roles such as Adina in Donizetti's L'elisir d'amore, Constanze in Mozart's Die Entführung aus dem Serail, Despina in his Così fan tutte, the title role in Donizetti's Lucia di Lammermoor, Olympia in Offenbach's Les contes d'Hoffmann, Philine in Mignon by Ambroise Thomas, the Queen in Die Verurteilung des Lukullus, the Queen of the Night in Mozart's Die Zauberflöte, and Zerbinetta.
 Links: a. Die Verurteilung des Lukullus b. The Magic Flute c. Chicago d. The Magic Flute

Ex Output:

c