Complex sentence: It marked the 15th year of the band's history and the last official Kubasonics concert "for a while", before Brian Cherwick moved to St. John's Newfoundland.
Split into simpler sentences: It marked the 15'th year of the band's history and the last official Kubasonics concert for a while. For Kubasonics main-man Brian Cherwick moved to St. John's Newfoundland.