user: Question: In what week was the December 21, 1969 game?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 21, 1969', 'at Pittsburgh Steelers', 'L 16-13', 51360.0]
SQL:

assistant: SELECT "Week" FROM "Table" WHERE "Date" = 'December 21, 1969';