Instructions: 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: Which is the oldest university that Jeff Horton has coached at? Passage:Jeffrey Scott Horton (born July 13, 1957) is an American football coach. He currently is the offensive coordinator and running backs coach at San Diego State University. He was the interim head coach at the University of Minnesota, having replaced Tim Brewster, who was fired midway through the Golden Gophers' 2010 season. Horton previously served as the head coach at the University of Nevada, Reno in 1993 and at the University of Nevada, Las Vegas from 1994 to 1998. From 2006 to 2008, he a special assistant/offense and assistant offensive line coach for the St. Louis Rams of the National Football League (NFL), where he worked under head coach Scott Linehan. Horton coached the quarterbacks for the NFL's Detroit Lions in 2009.

Output:
b