user: Question: Which date is in CD format?
Columns: ['Region', 'Date', 'Label', 'Format', 'Catalog']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Japan', 'April 23, 1983', 'Alfa Records', 'stereo LP', 'ALR-28049']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Format" = 'CD';