user: Question: What day is their record 13-15?
Columns: ['Date', 'Opponent', 'Score', 'Loss', 'Attendance', 'Record']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['March 31', 'Rangers', '5 - 2', 'Millwood (0-1)', 46334.0, '1-0']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Record" = '13-15';