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.

Input: Consider Input: Question: On what album was the Gerry Rafferty song from that is referenced in the show? Passage:While telling Bart and Lisa about 1990, Homer says, "Tracey Ullman was entertaining America with [...] crudely drawn filler material." This is a reference to The Simpsonss debut as "bumpers" airing before and after commercials on The Tracey Ullman Show. The song "Those Were the Days" parodies the opening credits of the television show All in the Family. One of the people who run over the saxophone is a man on a tricycle, who promptly falls over. This is a reference to the show Rowan & Martin's Laugh-In. At the beginning of the flashback, the song "Don't Worry, Be Happy" by Bobby McFerrin can be heard. In the flashback, Dr. Hibbert fashioned his hair and attire like Mr. T in The A-Team. Homer can be seen watching Twin Peaks and The Giant is then shown waltzing with the White Horse. In King Toot's music store, when Homer buys Lisa her first saxophone, there is a guitar in the background that is similar to Eddie Van Halen's "Frankenstrat" guitar. The photo beside Kent Brockman on the news has him modeled after the Coppertone Girl. At the end of the episode, Lisa performs a brief, cruder rendition of the hook of "Baker Street" by Gerry Rafferty on her new saxophone before the music segues into the original song.


Output: b


Input: Consider Input: Question: Were the Vuippens and Holy Romans allied? Passage:Gümmenen Castle, of which nothing remains, was built by either the Counts of Burgundy or the Dukes of Zähringen as part of the defenses along the Saane, along with Laupen Castle and Grasburg Castle. The castle was built to defend a bridge over the river. By 1391, a village (villa inferiori Dicti castri) had developed around the bridge. In 1259, Peter of Savoy made Gümmenen into an imperial fief and imperial castellans took over the castle and village. In 1282–83 King Rudolph I of Germany forced the Savoy castellan out and granted it to a Habsburg knight, Ulrich II of Maggenberg as a fief. Ulrich's heirs sold the castle, ferry and ford to Fribourg in 1319. Fribourg then granted the lands to the knights of Vuippens, who lost it back to either the Holy Roman Empire or Fribourg in 1325. The castle and village were besieged and destroyed in 1333 during Bern and Fribourg's first war over the Sense and Saane valleys, the Gümmenenkrieg. The peace treaty brokered in 1333 by Queen Agnes returned Gümmenen to Fribourg.


Output: a


Input: Consider Input: Question: What are the names of the equestrian gold medallist's other sons? Passage:Roycroft was born in 1946 as the second of three sons to Bill Roycroft, an Olympic equestrian gold medallist, and his wife, Mavis. He won bronze medals in team eventing at the 1968 Mexico City and 1976 Montreal Olympics, competing alongside his father at both the games. He was selected for the 1980 Moscow Olympics but was affected by the boycott of the games. He was the Australian flag bearer at the 1984 Los Angeles Olympics; his father had done the same thing 16 years previously. He coached the Australian eventing team from 1988 to 2010, taking up the role from his father. his first Olympics as a coach were the 1988 Seoul Games; under his reign the eventing team won gold medals at the 1992 Barcelona, 1996 Atlanta, and 2000 Sydney Olympics and a silver medal at the 2008 Beijing games, and Matthew Ryan won an individual gold medal in 1992 and Andrew Hoy won an individual silver medal in 2000. He was chairman of the International Federation for Equestrian Sports Eventing Committee from 2000 to 2009, and also served as chair of Equestrian New South Wales and Equestrian Australia.



Output: b