user: Question: What was the date of the game that led to a 48-21-6 record?
Columns: ['Date', 'Visitor', 'Score', 'Home', 'Record']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['March 2', 'Pittsburgh', '4–5', 'Philadelphia', '39-20-6']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Record" = '48-21-6';