user: Question: What is the average Attendance for the Final round?
Columns: ['Date', 'Round', 'Opponents', 'H / A', 'Result F–A', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['20 February 2008', 'First knockout round First leg', 'Lyon', 'A', '1–1', 39219.0]
SQL:

assistant: SELECT AVG("Attendance") FROM "Table" WHERE "Round" = 'Final';