user: Question: Whose attendance was the highest when the team played Arsenal?
Columns: ['Round', 'Date', 'Opponent', 'Venue', 'Result', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['R2 1st Leg', '14 September 1999', 'Chesterfield', 'A', '0–0', 4941.0]
SQL:

assistant: SELECT MAX("Attendance") FROM "Table" WHERE "Opponent" = 'Arsenal';