user: Question: What was the GF attendance at the location of Sydney Football Stadium, Sydney (6)?
Columns: ['Season', 'Grand FinalDate', 'WinningTeam', 'Score', 'LosingTeam', 'Location', 'GF Attendance', 'Clive Churchill Medal']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [1988.0, '11 September 1988', 'Canterbury Bulldogs (6)', '24-12', 'Balmain Tigers', 'Sydney Football Stadium , Sydney (1)', 40000.0, 'Paul Dunn']
SQL:

assistant: SELECT "GF Attendance" FROM "Table" WHERE "Location" = 'Sydney Football Stadium, Sydney (6)';