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 old was Mike Singletary when he hired Johnson? Passage:Michael Eric Johnson (born May 2, 1967) is an American football coach and former quarterback, and current wide receivers coach for Mississippi State. He was the interim head coach for the UCLA Bruins football team after serving as their offensive coordinator. Previously, he spent two years with the San Francisco 49ers of the National Football League. Johnson was hired along with former offensive coordinator Jimmy Raye by San Francisco head coach Mike Singletary on February 6, 2009. Raye was fired on September 27, 2010 and Johnson was promoted. Beginning in 2014 he served for three seasons as head coach of The King's Academy Knights in Sunnyvale, California, before being hired as wide receiver coach by the University of Oregon in 2017.

Output:
b