user: Question: What was the earliest aired show that's returning on September 13?
Columns: ['Show', 'Last Aired', 'Previous Network', 'Retitled as/Same', 'New/Returning/Same Network', 'Returning']
Types: ['text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['Card Sharks', 1981.0, 'NBC', 'Same', 'CBS', 'January 6']
SQL:

assistant: SELECT MIN("Last Aired") FROM "Table" WHERE "Returning" = 'September 13';