user: Question: On what date was the record 39–54?
Columns: ['Date', 'Opponent', 'Score', 'Loss', 'Attendance', 'Record']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['July 1', 'Padres', '4–0', 'Banks (2–3)', 26221.0, '33–51']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Record" = '39–54';