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.

Example Input: Question: Which tribe was Chief Blackfish the Chief of? Passage:Little documentary evidence of Black Hoof's life appears in the historical record before 1795. As a child he may have been a member of a waundering band of some 400 Shawnees led by Peter Chartier between 1745 and 1748, who founded the community in Kentucky called Eskippakithiki and later moved to Sylacauga, Alabama, eventually settling in Old Shawneetown, Illinois. He probably took part in the Battle of Point Pleasant during Lord Dunmore's War against the Virginia militia in 1774. During the American Revolutionary War, he may have taken part in the siege of Boonesborough in 1778, which was led by Chief Blackfish, as well as the subsequent defense of the Shawnee village of Chillicothe in 1779. In the Northwest Indian War, Black Hoof was defeated by "Mad" Anthony Wayne and, following the collapse of the Indian confederation, surrendered in 1795.

Example Output: b

Example Input: Question: How many years did the person who possibly encouraged Eumenes to revolt reign? Passage:Although nominally under Seleucid control, Pergamon under Philetaerus enjoyed considerable autonomy. However, upon his succession, Eumenes, perhaps with the encouragement of Ptolemy II, who was at war with the Seleucids, revolted, defeating the Seleucid king Antiochus I near the Lydian capital of Sardis in 261 BC. He was thus able to free Pergamon, and greatly increase the territories under his control. In his new possessions, he established garrison posts in the north at the foot of Mount Ida called Philetaireia after his adoptive father, and in the east, northeast of Thyatira near the sources of the river Lycus, called Attaleia after his grandfather, and he extended his control south of the river Caicus to the Gulf of Cyme as well. Demonstrating his independence, he began to strike coins with the portrait of Philetaerus, while his predecessor had still depicted Seleucus I Nicator.

Example Output: b

Example Input: Question: Did Kai have any siblings when he auditioned at the SM Youth Best Contest? Passage:Exo-K's leader, Suho, was the first member to join SM Entertainment, after a successful audition through the company's casting system in 2006. The following year, Kai, with encouragement from his father, auditioned at the SM Youth Best Contest; he won and received a contract. Chanyeol, who took second place in a Smart Model Contest, and Sehun, who went through four auditions in two years, were the next members to become trainees in 2008. In 2010, Exo-K's D.O. sang for his audition and was eventually offered a contract. The last member of Exo-K to become a trainee was Baekhyun, who joined in 2011 through SM Entertainment's casting system and trained for approximately one year before debut. In Exo-M, Kris auditioned in 2008 at a global SM Entertainment audition in Canada, before moving to South Korea for training. That same year, Lay auditioned in Changsha, China, and subsequently moved to South Korea, while Xiumin attended an audition with his friend and won second place. In 2010, Luhan was scouted by an SM Entertainment representative in Seoul and passed his audition, while Tao was scouted at a talent show. The last member to join Exo-M was Chen, who took part in the casting system in 2011. The band's first televised performance was at the annual SBS Gayo Daejeon event on December 29, 2011.

Example Output:
a