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: Did Blake or Philby defect first? Passage:In May 1986, Souther requested Soviet citizenship, aware that the investigation against him was progressing. In June, fearing imminent arrest, Souther defected to the Soviet Union by flying from the United States to Rome, where the Soviet intelligence services transferred him to Moscow. Initially, Soviet counterintelligence units were suspicious of Souther's defection and feared that he was a double agent for the CIA, but he was cleared shortly afterwards. On 2 October 1986, Souther was granted Soviet citizenship in a decree from the Presidium of the Supreme Soviet, and adopted the Russian name Mikhail Yevgenyevich Orlov. Souther was well-received by the Soviet authorities, gifting him an apartment in Moscow and a dacha on the outskirts of the city, and promoting him to the rank of major in the KGB one of few foreign spies to be commissioned as an officer in the agency. Souther became actively engaged in scientific activities, developed his own English teaching program, walked around Moscow a lot, and travelled to other Soviet cities. Souther met and befriended other foreign Soviet intelligence agents that had defected including Kim Philby and George Blake. Souther married a Russian woman named Elena, an English teacher at the Intelligence Institute, and they had a daughter named Alexandra. In early 1989, Souther was awarded an Order of Friendship of Peoples for his contributions in the intelligence services following a petition from the KGB leadership.
Links: a. George Blake b. George Blake c. Dacha d. Major

Output: a

Input: Consider Input: Question: How many soldiers died in the battle that Stanley missed due to illness? Passage:He fought at several battles in Missouri, including the Battle of Wilson's Creek, where he guarded the supply trains. President Abraham Lincoln appointed Stanley as brigadier general September 28, 1861, although the U.S. Senate did not confirm the appointment until March 7, 1862. Fighting in the Western Theater, he participated in the operations against New Madrid, Missouri and the Battle of Island Number Ten. He was involved in numerous major battles, including the Second Battle of Corinth, where he commanded a division of infantry of the Army of the Mississippi, and the Battle of Stones River, in which he led the cavalry of the Army of the Cumberland. On March 11, 1863, Stanley was appointed major general to rank from November 29, 1862. Stanley also led the Union cavalry in the Tullahoma Campaign. He fell ill late in 1863 and missed the Battle of Chickamauga. In 1864, he fought under William Tecumseh Sherman as a division commander in the IV Corps of the Army of the Cumberland during the Atlanta Campaign, and he was promoted to command of the corps when Maj. Gen. Oliver O. Howard was named commander of the Army of the Tennessee. After the capture of the city, instead of employing him marching to the sea, Sherman dispatched Stanley and his IV Corps to Tennessee to help protect the state from invasion by John Bell Hood's Army of Tennessee.
Links: a. Army of Tennessee b. Missouri c. Battle of Chickamauga d. John Bell Hood

Output: c

Input: Consider Input: Question: Which person who wrote famous verse defences was born first? Passage:The 2nd dispute stage begins with Sandius, the Arian around 1670. Francis Turretin published De Tribus Testibus Coelestibus in 1674 and the verse was a central focus of the writings of Symon Patrick. In 1689 the attack on authenticity by Richard Simon was published in English, in his Critical History of the Text of the New Testament. Many responded directly to the views of Simon, including Thomas Smith, , James Benigne Bossuet, , Thomas Ittigius, Abraham Taylor and the published sermons of Edmund Calamy. There was the famous verse defences by John Mill and later by Johann Bengel. Also in this era was the David Martin and Thomas Emlyn debate. There were attacks on authenticity by Richard Bentley and Samuel Clarke and William Whiston and defence of authenticity by John Guyse in the Practical Expositor. There were writings by numerous additional scholars, including publication in London of Isaac Newton's Two Letters in 1754, which he had written to John Locke in 1690. The mariner's compass poem of Bengel was given in a slightly modified form by John Wesley.
Links: a. John Mill (theologian) b. Thomas Smith (scholar) c. Richard Bentley d. Christopher Sandius
Output: a