user: Question: What is the sum of attendance when the result was L 16-13?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 2, 1984', 'at Green Bay Packers', 'L 24-23', 53738.0]
SQL:

assistant: SELECT SUM("Attendance") FROM "Table" WHERE "Result" = 'L 16-13';