user: Question: What opponent has December 6, 1964 as the date?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 13, 1964', 'at San Francisco 49ers', 'W 26-17', 33204.0]
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Date" = 'December 6, 1964';