user: ### NOW ANSWER:
Question: When was the attendance 3686?
Columns: ['Date', 'Home', 'Score', 'Away', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['23 August 2008', 'Marathón', '4:0', 'Motagua', 2187.0]
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Attendance" = 3686.0;