user: Question: Who is the opponent on November 20, 1966?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 11, 1966', 'Minnesota Vikings', 'T 20-20', '29,312']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Date" = 'November 20, 1966';