You will be given a definition of a task first, then some input of the task.
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: Of the Canadian Football league teams where Corey Chamblin has coached, which team is the most recent to win a Grey Cup championship? Passage:Chamblin began his coaching career with the Frankfurt Galaxy of NFL Europe in 2006 before joining the Winnipeg Blue Bombers of the Canadian Football League in 2007 as the defensive backs coach. He then spent three seasons with the Calgary Stampeders in the same capacity while winning his first Grey Cup championship in 2008. He was then hired as the defensive coordinator of the Hamilton Tiger-Cats for the 2011 CFL season. On December 15, 2011, Chamblin was hired as the head coach of the Saskatchewan Roughriders. On November 10, 2013, Chamblin won his first CFL head coaching career playoff game, a 2925 win over the BC Lions. On November 17, 2013, Chamblin won the West Final over the Calgary Stampeders, taking the Roughriders to the Grey Cup, which they won on November 25, the first time in his head coaching career.

Output:
b