Definition: 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.
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 École des Mines in Saint-Étienne in 1833. There he met Adèle Hériot 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 Société de Géographie and the Société géologique and published a number of scientific papers. In 1844 the Société de Géographie awarded him their Gold Medal .


b