user: Question: On what Week was the Detroit Lions the Opponent?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Record', 'Game Site', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 26, 1954', 'Los Angeles Rams', 'L 0–48', '0–1', 'Memorial Stadium', 36215.0]
SQL:

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