user: Question: How many were in attendance of the game with L 26-21 result?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 9, 1961', 'Oakland Raiders', 'W 55–0', '16,231']
SQL:

assistant: SELECT "Attendance" FROM "Table" WHERE "Result" = 'L 26-21';