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 Input:
Question: What year was the treaty that opened up the Korean Peninsula to Japanese trade signed? Passage:Un'yo was one of the ships dispatched to Kyushu in 1874 during the Saga Rebellion. In May 1875, she carried diplomats to Busan in Korea in an attempt by the Japanese government to open diplomatic relations with the Joseon dynasty government. After they were rebuffed in these negotiations, the Japanese government again dispatched Un'yo in September 1875 under the command of Inoue Yoshika to provoke a military response, in what was later termed the Ganghwa Island incident. This eventually led to the Treaty of Ganghwa, which opened the Korean Peninsula to Japanese trade. In 1876, Un'yo was assigned to assist in the suppression of the Hagi Rebellion, another uprising of disaffected former samurai. Un'yo was severely damaged when she ran aground off the coast of the Kii Peninsula, and was scrapped the following year.

Ex Output:
b

Ex Input:
Question: How many games did Felix de los Heros play for Barakaldo FC and Sevilla FC combined? Passage:It is unclear where or when de los Heros started his playing career but in 1932 he was playing for Barakaldo FC. In 1934 he moved to Sevilla FC. Late in 1936 he joined Gimnastico de Valencia. In 1937, in the middle of the Spanish Civil War, he joined Barcelona FC. His first game for them was on the 16 May 1937 against the Catalan national team. He never actually played for them in the domestic league but participated in the Barcelona FC tour of North America later in 1937. When the tour ended he signed for Brooklyn Hispano, a United States team that played in the American Soccer League. Later he moved to Mexico where he played for Club Deportivo Euzkadi in the Primera Fuerza league for the 1938/39 season. He also played for the Basque Country national football team twice during that period. Later he joined Club Espana, before going on to play in several other Mexican teams.

Ex Output:
a

Ex Input:
Question: How old was Kelvin Sampson when he was hired by Houston as their head coach? Passage:On April 3, 2014, Houston hired Kelvin Sampson as the new Cougars head coach. Sampson had just become eligible to be a college coach again after receiving a five-year show cause penalty in 2008 for sanctions against him during his time as Indiana head coach. In 201415, Houston struggled again, finishing with a 1319 record and 414 in the AAC. The 201516 team led a resurgence, finishing 2210, 126, but lost in the AAC Tournament and in the first round of the NIT. In 201718, the Cougars compiled a 278 record, reaching the finals of the AAC Tournament and winning a game in the NCAA Tournament for the first time since 1984. In 201819, the Cougars' success continued as they set a program record for wins with a 334 mark. They were AAC regular-season champions but fell in the finals of the conference tournament. They proceeded to the NCAA Tournament, where they reached the Sweet Sixteen for the first time in 35 years.

Ex Output:
b