Question: Night Castle is the fifth rock opera by an American progressive rock band that was founded in 1993 by what producer?
Sentence (from "Trans-Siberian Orchestra"): Trans-Siberian Orchestra (TSO) is an American progressive rock band founded around 1993 by producer, composer, and lyricist Paul O'Neill, who brought together Jon Oliva and Al Pitrelli (both members of Savatage) and keyboardist and co-producer Robert Kinkel to form the core of the creative team.
Relevant evidence: Yes