user: Question: How many times did the Centurions play the Rhein Fire?
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 2', '6:00 p.m.', 'Hamburg Sea Devils', 'W 24–23', '1–0', 'RheinEnergieStadion', 9468.0]
SQL:

assistant: SELECT COUNT("Game site") FROM "Table" WHERE "Opponent" = 'Rhein Fire';