user: Question: What is the lowest Attendance, when Date is "december 20, 1970", and when Week is less than 14?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 20, 1970', 'Denver Broncos', 'L 25–10', 34882.0]
SQL:

assistant: SELECT MIN("Attendance") FROM "Table" WHERE "Date" = 'december 20, 1970' AND "Week" < 14.0;