user: Question: In what week was the first game played at the Commerzbank-Arena?
Columns: ['Week', 'Date', 'Kickoff', 'Opponent', 'Final score', 'Team record', 'Game site', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'Saturday, April 14', '7:00 p.m.', 'at Frankfurt Galaxy', 'L 14–30', '0–1', 'Commerzbank-Arena', 38125.0]
SQL:

assistant: SELECT MIN("Week") FROM "Table" WHERE "Game site" = 'Commerzbank-Arena';