Given the task definition and input, reply with output. 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.

Question: How long did Correia work with Coelho at the company Fomentinvest? Passage:Angelo Correia is a Portuguese manager, engineer and politician, former Minister of Internal Administration of the Portuguese Government under the leadership of Anibal Cavaco Silva. He was also member of the Portuguese Parliament (the Assembleia da Republica) for the Portuguese Social Democrats (PSD) from 1976 to 1995. He was awarded a degree in chemical-industrial engineering by the Instituto Superior Tecnico of the Technical University of Lisbon (1968). Angelo Correia was appointed chairman of the company Fomentinvest, and worked at that company with Pedro Passos Coelho during the 2000s. Correia, an experienced member of PSD, is a close friend of Passos Coelho, both inside their party and corporate governance careers, and is considered Passos Coelho's political mentor.
b