Complex sentence: Sarzo was replaced in Quiet Riot by Chuck Wright (formerly of Giuffria) and the group temporarily added a keyboardist, John Purdell, for their 1986 tour.
Split into simpler sentences: Sarzo was replaced in Quiet Riot by Chuck Wright (formerly of Giuffria). The group also temporarily added a keyboardist, John Purdell, for their 1986 tour.