user: Question: Which Last Aired has a Retitled as/Same of Classic Concentration?
Columns: ['Show', 'Last Aired', 'Previous Network', 'Retitled as/Same', 'New/Returning/Same Network', 'Returning']
Types: ['text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['Charles in Charge', 1985.0, 'CBS', 'Same', 'Syndication', 'January 3']
SQL:

assistant: SELECT "Last Aired" FROM "Table" WHERE "Retitled as/Same" = 'Classic Concentration';