event_name: Rock Concert 2026 | seat: A1
event_name: Rock Concert 2026 | seat: A2
event_name: Rock Concert 2026 | seat: A3
event_name: Rock Concert 2026 | seat: B1
event_name: Rock Concert 2026 | seat: B2
event_name: Rock Concert 2026 | seat: B3
event_name: Rock Concert 2026 | seat: C1
event_name: Rock Concert 2026 | seat: C2