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: Did Nantz join CBS sports before Clark Kellogg? Passage:Nantz joined CBS Sports in 1985, initially working as a studio host for the network's college football and basketball coverage, and as an on-course reporter for PGA Tour golf, as well as calling NFL games on Westwood One (from 1988 to 1990, when he was moved to television, Nantz called Sunday Night Football games for what was then called CBS Radio Sports). Nantz has anchored CBS' coverage of the Masters Tournament since 1989. He teamed with Billy Packer to call the NCAA Final Four men's basketball finals from 1991 until 2008. From 2008 to 2013, Clark Kellogg had been his analyst. From 2010 to 2013, Nantz and Kellogg were joined during the Final Four by Steve Kerr of TNT Sports. From 2013 to 2014, Greg Anthony partnered with Nantz. Following Anthony's suspension, Bill Raftery and Grant Hill were selected to replace him and are Nantz's new partners. Leading up to the Final Four, Nantz typically covers the games of the team awarded the overall #1 seed.


b