user: Question: What is the date of the game at Olympic Stadium?
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, March 18', '6:00 p.m.', 'Cologne Centurions', 'L 10–14', '0–1–0', 'AOL Arena', 15243.0]
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Game site" = 'Olympic Stadium';