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: Does the band from Chicago that covered the song in 1998 still put out albums? Passage:"Hounds of Love" was covered in 1998 by the Australian band Bluebottle Kiss on their EP Tap Dancing on the Titanic. In 2005 the Australian pop band Frente! added the song to their Try To Think Less EP. Indie rockers Ra Ra Riot performed "Hounds of Love" as a WOXY.com Lounge Act in 2007. Australian band The Church released a cover version of the song on their Coffee Hounds single in 2009. Thirty Seconds to Mars covered the song in 2010. Beth Sorrentino covered the song on Hiding Out. Faroese singer Eivr covered the song in 2010 that appeared on her album Larva. Chicago Power-pop band, The Moviegoers covered the song in 1998 as part of the Kate Bush Tribute Album, I Wanna Be Kate. Patrick Wolf did a version of this single.

Example Output: b

Example Input: Question: What were the combined ages of Joseph Urban and Benjamin Wistar Morris the year that they were both hired to come up with blueprints for the house? Passage:The construction of Rockefeller Center occurred between 1932 and 1940 on land that John D. Rockefeller Jr. leased from Columbia University. The Rockefeller Center site was originally supposed to be occupied by a new opera house for the Metropolitan Opera. By 1928, Benjamin Wistar Morris and designer Joseph Urban were hired to come up with blueprints for the house. However, the new building was too expensive for the opera to fund by itself, and it needed an endowment, and the project ultimately gained the support of John D. Rockefeller Jr. The planned opera house was canceled in December 1929 due to various issues, with the new opera house eventually being built at Lincoln Center, opening in 1966.

Example Output: a

Example Input: Question: What is the age difference between Byzantine Emperor and his father-in-law? Passage:With the ascendance of Simeon I to the throne in 893, the long-lasting peace with the Byzantine Empire established by his father was about to end. A conflict arose when Byzantine Emperor Leo VI the Wise, acting under pressure from his wife Zoe Zaoutzaina and her father, Stylianos Zaoutzes, moved the marketplace for Bulgarian goods from Constantinople to Thessaloniki, where Bulgarian merchants were heavily taxed. Forced to take action, in the autumn of 894 Simeon invaded the Byzantine Empire from the north, meeting little opposition due to the concentration of most Byzantine forces in eastern Anatolia to counter Arab invasions. Informed of the Bulgarian offensive, the surprised Leo sent an army consisting of guardsmen and other military units from the capital to halt Simeon, but his troops were routed somewhere in the theme of Macedonia.The Magyars managed to defeat Simeon's army twice, but in 896 they were routed in the Battle of Southern Buh. The war ended in 896 with a great Bulgarian victory near Bulgarophygon in Eastern Thrace. The market was returned to Constantinople, and the Byzantine Emperor had to pay annual tribute to Bulgaria. More importantly, with help from the Pechenegs Simeon successfully fended off a Magyar invasion, which was coordinated with the Byzantines.

Example Output:
a