user: Question: Who was the opponent on November 15, 1981?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 6, 1981', 'at Los Angeles Rams', 'W 27–20', 63198.0]
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Date" = 'November 15, 1981';