user: Question: WhAt is the highest AttendAnce for the mAtch AgAinst West Ham United At the venue of A?
Columns: ['Date', 'Opponent', 'Venue', 'Result', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['7 August 1999', 'Liverpool', 'H', '1-2', 34853.0]
SQL:

assistant: SELECT MAX("Attendance") FROM "Table" WHERE "Venue" = 'A' AND "Opponent" = 'West Ham United';