user: Question: Who was the opponent with an attendance of 628?
Columns: ['Round', 'Date', 'Opponent', 'Venue', 'Result', 'Attendance', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1st', 'bye', 'bye', 'bye', 'bye', 'bye', 'bye']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Attendance" = '628';