Table:
text: 1970 Buffalo Bills season
Schedule
Schedule
Week Date_ Opponent Result_ Attendance
11 November 29, 1970 Boston Patriots L 14–10 31427
12 December 6, 1970 at New York Giants L 20–6 62870
13 December 13, 1970 Baltimore Colts L 20–14 34346
14 December 20, 1970 at Miami Dolphins L 45–7 70990

Question: What is the lowest attendance if the date is December 20, 1970 and if the week is less than 14 for the Buffalo Bills 1970 season game schedule?