user: Question: What is the average attendance of the Mariners' attendance when their record was 62-64?
Columns: ['Date', 'Opponent', 'Score', 'Loss', 'Attendance', 'Record']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['August 1', '@ Angels', '5 - 0', 'Halladay (15-3)', 42635.0, '54-55']
SQL:

assistant: SELECT AVG("Attendance") FROM "Table" WHERE "Opponent" = 'Mariners' AND "Record" = '62-64';