Question: Billy Greer, is the current bass guitarist for the band Kansas, he also was a member of the brief 2009 Kansas side project "Native Window" along with David Ragsdale, he has been the violinist for which band, from 1991 to 1997 and from 2006 to the present?
Sentence (from "Billy Greer"): He had previously worked with keyboardist/vocalist Steve Walsh in the band Streets, and works with his own band Seventh Key when not performing with Kansas.
Relevant evidence: No