Question: Ock Joo-hyun has participated in which musical written by Frank Wildhorn based on the book of the same name?
Sentence (from "Rudolf (musical)"): Rudolf is a musical conceived for the stage by Frank Wildhorn and Steve Cuden, with a book by Jack Murphy and Phoebe Hwang, lyrics by Murphy, additional lyrics by Nan Knighton, and music by Frank Wildhorn.
Relevant evidence: No