user: Question: The Detroit Lions were played against what week?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 10, 1989', 'Los Angeles Rams', 'L 31-21', 38708.0]
SQL:

assistant: SELECT "Week" FROM "Table" WHERE "Opponent" = 'Detroit Lions';