Question: What guest musician that was featured in Derek Sherinian's albums won the "Best Rock Bass Player" readers' poll from "Guitar Player" magazine five times for his "lead bass" playing style?
Sentence (from "Derek Sherinian"): He was also a member of Dream Theater from 1994–99, is the founder of Planet X and also one of the founding members of Black Country Communion and Sons of Apollo.
Relevant evidence: No