Complex sentence: Noteworthy Opera traditions include the annual Yellow Rose Ball, Colorado's oldest debutante ceremony, on opening day, and the Ushers Song (sung by the Usher Corps as they march up the street to open the theatre for each mainstage performance).
Split into simpler sentences: Noteworthy Opera traditions include the annual Yellow Rose Ball, Colorado's oldest debutante ceremony, on opening day. The Ushers Song (sung by the Usher Corps as they march up the street to open the theatre for each mainstage performance).