Table:
text: 1980 Miami Dolphins season
Schedule
Schedule
Week Date_ Opponent Result_ Attendance
1 September 7, 1980 at Buffalo Bills L 17–7 79598
2 September 14, 1980 Cincinnati Bengals W 17–16 38322
3 September 21, 1980 at Atlanta Falcons W 20–17 55470
4 September 28, 1980 New Orleans Saints W 21–16 40946
5 October 5, 1980 Baltimore Colts L 30–17 50631
6 October 12, 1980 at New England Patriots L 34–0 60377
7 October 19, 1980 Buffalo Bills W 17–14 41636
8 October 27, 1980 at New York Jets L 17–14 53046
9 November 2, 1980 at Oakland Raiders L 16–10 46378
10 November 9, 1980 at Los Angeles Rams W 35–14 62198

Question: How many people attended the September 21, 1980 game during the Miami Dolphins 1980 season?