user: Question: Name the kickoff for Rheinstadion
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 12', '7:00 p.m.', 'at Amsterdam Admirals', 'W 16–3', '1–0', 'Amsterdam ArenA', 16185.0]
SQL:

assistant: SELECT "Kickoff" FROM "Table" WHERE "Game site" = 'Rheinstadion';