In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it, i.e., the proper nouns in the passage. Your job is to determine whether information from more than one term is needed to answer the question. Indicate your choice as 'a' for Yes or 'b' for No.

Example Input: Question: What city is the university in that he was a visiting assistant professor at? Passage:Morrey graduated from Ohio State University with a B.A. in 1927 and a M.A. in 1928, and then studied at Harvard University under the supervision of George Birkhoff, obtaining a Ph.D. in 1931 with a thesis entitled Invariant functions of Conservative Surface Transformations. After being awarded his Ph.D, he was a National Research Council Fellow at Princeton, at the Rice Institute and finally at the University of Chicago. He became a professor of mathematics at UC Berkeley in 1933, hired by Griffith Conrad Evans, and was a faculty member until his retirement in 1973. In Berkeley, he was early given several administrative duties, for example being the Chairman of the Department of Mathematics during the period 19491954, and being the Acting Chairman, the Vice Chairman and the Director of the Institute of Pure and Applied Mathematics at various times. During the years 19371938 and 19541955 he was a member of the Institute for Advanced Studies: he was also Visiting Assistant Professor at Northwestern University, Visiting Professor at the University of Chicago and Miller Research Professor at Berkeley. During World War II he was employed as a mathematician at the U.S. Ballistic Research Laboratory in Maryland.

Example Output: b

Example Input: Question: What year was the treaty that opened up the Korean Peninsula to Japanese trade signed? Passage:Un'yo was one of the ships dispatched to Kyushu in 1874 during the Saga Rebellion. In May 1875, she carried diplomats to Busan in Korea in an attempt by the Japanese government to open diplomatic relations with the Joseon dynasty government. After they were rebuffed in these negotiations, the Japanese government again dispatched Un'yo in September 1875 under the command of Inoue Yoshika to provoke a military response, in what was later termed the Ganghwa Island incident. This eventually led to the Treaty of Ganghwa, which opened the Korean Peninsula to Japanese trade. In 1876, Un'yo was assigned to assist in the suppression of the Hagi Rebellion, another uprising of disaffected former samurai. Un'yo was severely damaged when she ran aground off the coast of the Kii Peninsula, and was scrapped the following year.

Example Output: b

Example Input: Question: Which of the teams the John Roberts played for have won the most championships? Passage:Roberts played youth football for Cessnock before joining APIA Leichhardt in the New South Wales State League. He played at APIA in 1964 and 1965. In 1966, he travelled to England to trial with Football League Division One team Chelsea. After the unsuccessful trial he was signed by Blackburn Rovers in April 1966. Roberts played three times for Blackburn in the 196566 season, returning then to APIA where he played the remainder of the 1966 season. He was sent out on loan in August 1967 to Chesterfield in the Football League Fourth Division, where he played 46 matches during the 19671968 season. In 1968, he was signed by Bradford City; there he made 44 appearances between 1968 and 1970, and played in the team that won promotion from the Fourth Division to the Third Division in 1969. In early 1971 he transferred to Southend United, and at the end of the 19711972 season moved to Northampton Town, staying there for one season and playing 13 times.

Example Output:
a