Question: Which violinist worked with the American rock band "Seventh Key" who also worked at Tulsa Philharmonic?
Sentence (from "Seventh Key"): The band had two previous drummers, Chet Wynd (2001) and Jamie Thompson (2004), as well as guest appearances by David Ragsdale of Kansas on the violin (2005) and Johnny Greer on the mandolin (2005).
Relevant evidence: Yes