user: Question: Who is the opponent on September 9, 1979?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 2, 1979', 'Baltimore Colts', 'W 14–0', 50442.0]
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Date" = 'September 9, 1979';