In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as `a` for Yes or `b` for No.

[EX Q]: Question: How many years passed between the First Carlist War and the  war that mostly in Catalonia? Passage:The Basque Country was one of the main sites of battles during the First Carlist War, a civil war between supporters of the Spanish regent Maria Christina, known as liberals, and those of the late king's brother Carlos of Borbón, known as Carlists. The Carlists were particularly focused on capturing Bilbao, a liberal and economic bastion in northern Spain. The Carlist general Tomás de Zumalacárregui tried to take the city during the Siege of Bilbao of 1835, but he was wounded during a battle near Begoña and died some time after in the town of Zegama. The next year, the city resisted a second siege during which the liberal general Baldomero Espartero defeated the Carlists in the Battle of Luchana. The city was untouched by the Second Carlist War, which took place mostly in Catalonia, but was again an important scenario during the Third Carlist War; in April 1874 the city suffered a third siege which lasted two months.

[EX A]: b

[EX Q]: Question: What country did Kubrat attend the University of Navarra in? Passage:After completing his primary and secondary education at the Lycée Français in Madrid, Kubrat studied between 1984 and 1990 at the University of Navarra in Pamplona, where he obtained a Licentiate in Medicine and Surgery. After his graduation, he worked for five years as a resident physician at Puerta de Hierro Clinic in Madrid, where he made his expertise as a general surgeon. Subsequently he worked for a year at the St Mark's Hospital and Northwick Park Hospital and further specialized as a surgeon in proctology. Kubrat worked between 1997 and 2003 as a colorectal surgeon at the Ruber International Clinic in Madrid and was in charge of the Ambulatory Surgery Unit. Since September 2003, he became Head of the Colorectal Unit at the San Camillo Hospital in Madrid, where he also acts as Director of the Team Care Management since June 2006. He was director of Shared Medical Systems between 1999 and 2000, and is currently also part of the advisory board of Tokuda Hospital (Sofia, Bulgaria) and a Consultant for Mensor Health Care, S.L in Madrid.

[EX A]: b

[EX Q]: Question: How long had Les Paul guitars been made by Gibson? Passage:Old Black is a 1953 Gibson Les Paul Goldtop, painted black and customized considerably. After the guitar had been left at a guitar repair store, the original P-90 bridge pickup was replaced with a Gretsch Dynasonic single-coil pickup. Eventually, a mini humbucker pickup from a Gibson Firebird guitar replaced the Dynasonic. The neck pickup has always been the original P-90 pickup, but it is now covered by a hand fitted aluminum P-90 cover, replacing the original white plastic cover. The guitar was roughly resprayed to jet black, and received a new Tune-o-matic bridge (not available when the guitar was produced) and a B-7 model Bigsby vibrato tailpiece. It would presumably also have had a white plastic pickguard at some point, as was standard on 1953 Goldtops. Old Black is notable for its metal hardware, including aluminum backing plates. The pick guard is chrome-on-brass/bronze. The tuners have been replaced with Schaller M-6 tuning keys, and the rest of the hardware is mostly nickel-plated. The headstock displays a partially painted-over mother-of-pearl inlay, sometimes referred to as a "wheat stack", rather than the typical silk screened "Les Paul Model" logo, along with single-ply binding around the headstock, although the binding has now fallen off. 

[EX A]:
b