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: How many albums total did the Beatles record in Hamburg? Passage:Ain't She Sweet was an American album featuring four tracks recorded in Hamburg in 1961 by The Beatles featuring Tony Sheridan (except for the title song with vocal by John Lennon) and cover versions of Beatles and British Invasion-era songs recorded by the Swallows. As Atlantic Records only had rights to four Sheridan/Beatle recordings recorded by Polydor Records, they filled the rest of the album with Beatle and British Invasion cover songs. When this material was released by Atco Records, there were mono (catalogue number 33-169) and stereo (SD 33-169) editions. Atco also added additional drum overdubs to the four Sheridan cuts on top of the original drum tracks. American drummer Bernard Purdie claims to have performed overdubs of unspecified Beatles records, which would most likely have been for Ain't She Sweet, but this has never been officially confirmed.

Example Output: a

Example Input: Question: Where is the organization where Yelick served as director from 2008-2012 headquartered?  Passage:Katherine Yelick received her SB, SM, and PhD in computer science from the Massachusetts Institute of Technology. She joined the faculty at the University of California, Berkeley in 1991. She joined the research staff at Lawrence Berkeley National Laboratory in 1996 as a joint-appointment faculty research scientist, and has been the Associate Laboratory Director for Computing Sciences since 2010. She is known for her work in partitioned global address space programming languages, including co-inventing the Unified Parallel C (UPC) and Titanium languages. She also led the Sparsity project, the first automatically tuned library for sparse matrix kernels, and she co-led the development of the Optimized Sparse Kernel Interface (OSKI). From 2008 to 2012 she was the director of the National Energy Research Scientific Computing Center. From 2009 to 2015 she was a member of the California Council on Science and Technology.

Example Output: b

Example Input: Question: In what country did Polozov make a debut in 1982? Passage:In 1978, he became the leading tenor of the Saratov Academic Opera and Ballet Theatre when he performed: Vladimir Igorevich in Borodin's Prince Igor, The Prince in Dargomyzhsky's Rusalka, Lensky in Tchaikovsky's Eugene Onegin, Lohengrin in Wagner's Lohengrin and in 1980 he became a member of the National Academic Opera and Ballet Theatre of the Republic of Belarus when he performed: Faust in Gounod's Faust, Alfredo in Verdi's La Traviata, the Duke of Mantua in Verdi's Rigoletto, Prince Kuragin in Prokofiev's War and Peace, Pinkerton In Puccini's Madama Butterfly, Vodemon in Tchaikovsky's Iolanta, Tsar Berendey in Rimsky-Korsakov's The Snow Maiden. As a member of the Opera Theatre (Minsk), in 1982, Polozov made his successful debut with the Bolshoi Theatre when he performed Alfredo opposite and Turiddu in Mascagni's Cavalleria rusticana opposite Makvala Kasrashvili and Elena Obraztsova. In 1983, he made his debut in the role of Faust at the Lithuanian National Opera opposite and Irena Milkeviciute. In 1984, he made debut for the role of the Duke of Mantua at the Bulgarian National Opera and Lensky at the Novosibirsk Opera and Ballet Theatre. In 1984, he performed the role of Alfredo at the Estonian National Opera and Latvian National Opera. In January 1986, another great success followed - Polozov's debut at the Teatro alla Scala in Milano where he sang the role of Pinkerton, which very soon became, along with the role of Rodolfo in La Boheme the most important roles in his repertoire. In May 1986 after winning the prestigious Madama Butterfly singing competition (Tokyo, Japan), Polozov announced his intention to live in the United States. Since his arrival in the USA, Polozov has appeared in numerous highly praised performances throughout the country - from Chicago (city of his American operatic debut for the role of Rodolfo La Boheme with Michael Tilson Thomas) to Boston, New York (his Metropolitan Opera debut in January 1987 in the role of Pinkerton opposite Renata Scotto, to California's Palm Springs and Texas - at the San Antonio Festival ("Tosca") with Julius Rudel, which received highest public and press acclaim. He also appeared in the Metropolitan Opera summer season in parks for the role of Rodolfo and a concert and recording in Washington D.C. (Kennedy Center) of Boris Godunov the role of Dimitry, opposite Ruggero Raimondi as Boris, Galina Vishnevskaya as Marina, Nicolai Gedda as the Simplenton and Paul Plishka as Pimen under the baton of Mstislav Rostropovich. The new 1987/88 season started for Polozov with a great success when he appeared in the role of Calaf in Puccini's Turandot in New York City Opera, and the very same week repeated this role in Munich's Bayerische Staatsoper with Giuseppe Patane. During the 1988/89 season, he performed in San Francisco Opera in the role of Enzo in La Gioconda opposite Eva Marton and in the role of Cavaradossi in Puccini's Tosca at the Canadian Opera Company. Soon he was engaged to perform in Paris, Hamburg, Barcelona, Rome, Lyon, Houston, Miami, Los Angeles, Santiago, Tokyo, and other world opera houses. He sang almost every major tenor roles of the Russian, Italian, German and French repertory and evenly produced voice, brilliant upper register, and stylish singing, are shown to best effect.

Example Output:
b