user: Question: What is the highest attendance for the game before week 13 on december 9, 1973?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 16, 1973', 'San Diego Chargers', 'W 38-0', 53589.0]
SQL:

assistant: SELECT MAX("Attendance") FROM "Table" WHERE "Date" = 'december 9, 1973' AND "Week" < 13.0;