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: How many countries border the body of water on the coast of which Hommaire coordinated the construction of a lighthouse? Passage:After attending school in Altkirch and Dijon, Hommaire graduated as an engineer at the Ecole des Mines in Saint-Etienne in 1833. There he met Adele Heriot whom he married in 1834. In October 1835, he went Turkey where he coordinated the construction of a suspension bridge in Constantinople and a lighthouse on the Black Sea coast. In 1838, he arrived in southern Russia where he performed ethnographical research and geographical surveys. After he discovered coal resources along the Dnieper River, Czar Nicholas I awarded him the St Vladimir Cross. In 1842, while working on mining and road-building projects in Moldavia, he fell ill and returned to France. The following year he became a member of the Societe de Geographie and the Societe geologique and published a number of scientific papers. In 1844 the Societe de Geographie awarded him their Gold Medal .

Ex Output:
b

Ex Input:
Question: What team won the tournament that Real Zaragoz qualified for in the 2006-07 season after finishing sixth? Passage:Mainly due to Diego Milito's 23 goals in 200607 (he finished third to Roma's Francesco Totti and Real Madrid's Ruud van Nistelrooy 26 and 25 goals, respectively in the European Golden Shoe race), Real Zaragoza finished in sixth position, thus qualifying to the UEFA Cup. However, the following season ended in relegation for the second time in the decade with the side also being eliminated in the first round in European competition. Legendary club coach Victor Fernandez returned for a second spell, although he was sacked in January 2008, as the club had four managers during the campaign. On the last matchday, a brace from Ricardo Oliveira proved insufficient in a 23 away loss against Mallorca, with the team totalling 42 points to Osasuna's 43.

Ex Output:
b

Ex Input:
Question: Of the homes built in the historic district during the antebellum period, which style is older? Passage:The George S. Houston Historic District is a historic district in Athens, Alabama. The district lies to the west and north of the public square, and features homes of some of the town's most prominent residents. Development began in the district soon after the town was founded in 1818; there are five homes remaining from the antebellum period. The district saw moderate growth between the Civil War and the early 1900s, most of which are Queen Anne and Victorian styles. The majority of houses in the district were constructed between 1908 and 1939. As the need for housing in the town grew, larger antebellum lots were subdivided and new construction was added. Larger houses tended to be American Foursquares, while middle-class houses were bungalows and cottages, some with Tudor Revival and Colonial Revival details. The district is entirely residential, with the exception of the First Methodist Church, built in 1925 in Neoclassical style; 400 North Jefferson was built in 1935 as a hospital, but later converted to apartments. Other notable properties in the district include the George S. Houston House, which was converted into a public library. The district was listed on the National Register of Historic Places in 1989.

Ex Output:
b