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 long had Manchester Airport been in operation for the year Keegan made his debut? Passage:Gerard "Ged" Keegan (born 3 October 1955 in Bradford, West Riding of Yorkshire) is an English former footballer who played as a right-back. He joined Manchester City as a trainee in 1973 and made his debut in March 1975 in a 2–1 defeat against Carlisle United. He made a total of 37 Football League appearances for the club, scoring two goals. However his most memorable game for them was in their 1976 Football League Cup Final victory. He also played in the first ever England under-21 match. In 1978, he was transferred to Oldham Athletic where he made 144 League appearances (scoring 5 goals) before moving to Mansfield Town in 1983. After a short spell here he moved on to Rochdale, and then to Altrincham. As of 2008 he was working as a car-parking attendant at Manchester Airport.


b