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: Who was the older of the two - Joe Airey, or the original member of the radar team that Airey joined? Passage:Airey was born in Oldham, Lancashire on 25 August 1894. He joined Robert Watson-Watt in 1924, and was an original member of the radar team, responsible for masts and support equipment. He was Senior Technical Officer at Telecommunications Research Establishment. Alongside Arnold Wilkins, Airey is credited with having discovered Bawdsey Manor, Ordfordnessas a site for the Air Ministry department that was significant in the history of radar. In his book "Three Steps to Victory" Robert Watson-Watt proclaims Joe Airey's greatest constructional achievement as the installation of a mast atop the Great Pyramid at Cheops. During World War I, Airey was a member of the Dunsterforce in the Persia and the Middle East. By the time of his retirement, he was Station Engineer at the Royal Radar Establishment. He was appointed a Member of the Order of the British Empire (MBE) for his services by King George VI in his Birthday Honours on 14 June 1945. Airey died in Poole Dorset on 10 February 1976.

Ex Output:
b

Ex Input:
Question: Which place is older, Chernihiv or Lutsk? Passage:In 1180, Ingvar Yaroslavich joined Ryurik Rostislavich in his struggle against Sviatoslav Vsevolodovich of Chernihiv. According to the Tale of Igor's Campaign, Ingvar was a brave man, however, he never wanted to irritate his powerful neighbors. In 1183, for instance, Ingvar refused to accommodate Vladimir II Yaroslavich in Dorogobuzh, who had been banished from Halych. It appears that Ingvar was wary of Yaroslav Osmomysl, Vladimir Yaroslavich's father. Soon after this, Ingvar took the place of his older brother Vsevolod Yaroslavich as the ruler of Lutsk. In 1202, Ingvar was appointed ruler of Kiev instead of the ousted Ryurik Rostislavich in accordance with a deal between Roman Mstislavich of Halych and Vsevolod the Big Nest, Grand Prince of Vladimir. Ryurik, however, would regain Kiev that same year with the help of the Olgovichs and polovtsy. In 1204, Ingvar took part in capturing the city of Volodymyr-Volyns'kyi together with Alexander of Belz. He was appointed ruler of the city on the spot, but was soon replaced by Alexander due to boyars' discontent. In 12081211, Ingvar sent his son to assist Daniil Romanovich in his struggle against the sons of Igor Sviatoslavich of Novhorod-Siverskyi. In 1212, Ingvar and Mstislav Romanovich attacked Vsevolod Sviatoslavich and captured Kiev. After a battle near Belgorod Ingvar voluntarily ceded Kiev to Mstislav Romanovich and left for Lutsk.

Ex Output:
b

Ex Input:
Question: Who owns the team that Schwartz joined when he turned professional? Passage:In 1979, Schwartz graduated from Miramar High School where he was a star soccer player. During his three high school seasons, he scored 104 goals. He then attended Appalachian State University where he played on the men's soccer team. He graduated in 1982 and was inducted into the school's Athletic Hall of Fame in 2005. In 1984, Schwartz turned professional Fort Lauderdale Sun of the United Soccer League. He was the Rookie of the Year and playoff MVP. In the fall of 1984, Schwartz had an unsuccessful trial with the Dallas Sidekicks of the Major Indoor Soccer League. He then returned to Florida where he coached the Hollywood Hills High School girls team and played for the amateur Lowenbrau Lions of the Gold Coast Soccer League's First Division. In 1985, the Sun moved and changed their name to the South Florida Sun. The team and the league collapsed six games into the season. Schwartz then worked as a carpenter, coached Hollywood High and played for the Lowenbrau Lions. In 1986, Andrew College hired Schwartz took start a women's soccer team at the college. In 1986, he played for the Houston Dynamos. In March 1988, he signed with the Fort Lauderdale Strikers of the American Soccer League. He then started the Strikers first game of the 1989 season, but didn't play after that. He asked for and was granted his release from the team in May. Starting in August 2015, Mark has been working as a Project Engineer for Bernhardt Design in Lenoir, North Carolina.

Ex Output:
b