user: Question: Which Attendance has an Opponent of Perth Glory, and a Round of 9?
Columns: ['Round', 'Date', 'Opponent', 'Score AUFC – Away', 'Attendance', 'Weekday']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['1', '17 August 2008', 'Perth Glory', '1 – 0', 10510.0, 'Sunday']
SQL:

assistant: SELECT "Attendance" FROM "Table" WHERE "Opponent" = 'Perth Glory' AND "Round" = '9';