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 ruled the Seljuk Empire when they annexed Taşburun? Passage:According to mayor's page Taşburun was founded by Turkmen tribe named Taşburun after Seljuks annexed the area to their realm in 1064. In 1239 it was captured by the Mongols and in 1514 by the Ottoman Empire. It was ceded to Safavid Persia by the Treaty of Istanbul (1736) . In 1746 it was returned to Ottoman Empire by the Treaty of Kerden but lost to Russian Empire by the Treaty of San Stefano signed after the Russo-Turkish War (1877–1878). At the end of the First World War it was returned to Turkey. In 1993 it was declared a seat of township.
 Links: a. World War I b. Ottoman Empire c. Treaty of San Stefano d. Seljuq dynasty

Ex Output:
d


Ex Input:
Question: Which ground did the Liverpool Football Club play at longer, Anfield or Goodison Park? Passage:Liverpool Football Club is an English association football club based in Liverpool, Merseyside, which competes in the top tier of English football, for the 2019–20 season. The club was formed in 1892 following a disagreement between the board of Everton and club president John Houlding, who owned the club's ground, Anfield. The dispute over rent resulted in Everton leaving Anfield for Goodison Park, which left Houlding with an empty stadium. Not content for his ground to lay idle, he created his own club: Liverpool. Liverpool joined the Lancashire League on their foundation before the 1892–93 season. They ended their inaugural season as league champions, and were elected to The Football League soon afterwards. The club remained in The Football League until 1992, when its First Division was superseded as English football's top level by the newly formed Premier League.
 Links: a. Goodison Park b. Anfield c. Liverpool F.C. d. Association football

Ex Output:
a


Ex Input:
Question: Was Isabella married to John Zapolya when he appointed Vrancic as provost and royal secretary? Passage:In 1530 John Zápolya appointed him as the provost of the Buda cathedral and as a royal secretary. Between 1530-1539 he was also the deputy of the King and after his death he remained with his widow, Isabella Jagiellon. In 1541 he moved with her to Transylvania, but he mostly traveled fulfilling diplomatic services because of his disagreement with cardinal Juraj Utješinović's policy of claiming the Hungarian throne for Isabella's and Zápolya's infant son (instead of conceding it to Ferdinand I as per Treaty of Nagyvárad). Utješinović, appointed by Zápolya as a guardian of his son, John Sigismund Zápolya, fought against Ferdinand and allied himself with the Ottoman Empire.
 Links: a. John Zápolya b. Provost (religion) c. Isabella Jagiellon d. Eastern Hungarian Kingdom

Ex Output:

a