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: 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

Ex Output:
a


Ex Input:
Question: Were there any famous performers at the music festival McCollum often performed at? Passage:During the mid-1950s McCollum was highly busy performing as a concert soloist and performed with some frequency in operas with the New England Opera Theatre (NEOT). He sang frequently with the Boston Symphony Orchestra under conductor Charles Munch, often at the Tanglewood Music Festival, performing works like the role of the evangelist in Bach's Johannes Passion (1956). He was also a regular performer with the Dessoff Choirs under conductor Paul Boepple, performing as a tenor soloist in oratorios like Handel's Messiah (1956) and Handel's Israel in Egypt (1957). One work which he performed with frequency during these years was J.S. Bach's Mass in B Minor, which he first performed in February 1955 with the Chicago Symphony Orchestra under conductor Margaret Hillis. He later performed the work with the Boston Symphony Orchestra at Tanglewood in the summer of 1955 and with the Philadelphia Orchestra at the Bethlehem Bach Festival in 1956. In March 1955 he sang Helenus in a lauded production of Berlioz's Les Troyens with the New England Opera Theater opposite Eunice Alberts as Cassandre, Marriquita Moll as Dido, and Arthur Schoep as Aeneas.
 Links: a. Tanglewood Music Festival b. George Frideric Handel c. Johann Sebastian Bach d. Mass in B minor

Ex Output:
a


Ex Input:
Question: Which season of Boston Public did Davetta Sherwood guest star in? Passage:Sherwood later began taking acting lessons and landed a guest role on the TV sitcom My Wife and Kids. In 2003, she was cast in the short lived series Platinum as the feisty Jade Rhames alongside Sticky Fingaz and Jason George. The show was written by Sophia Coppola and was about two brothers who ran a hip hop record label. it was canceled and only aired six episodes. During 2003, Sherwood guest starred on Boston Public, in which she played Dina Fallow. In 2005, she appeared in two films: as Tosha Cooper in Back in the Day, alongside Tatyana Ali, and as Patty in the horror film Venom, also starring Agnes Bruckner and Jonathan Jackson. Venom was harshly received by critics, with Entertainment Weekly dubbing it a "crappy horror movie". She guest starred on The Bernie Mac Show as Sherri in the episode Jack and Jacqueline.
 Links: a. Sticky Fingaz b. Boston Public c. My Wife and Kids d. Boston Public

Ex Output:

b