user: Question: Name the region for CD format on February 22, 1984
Columns: ['Region', 'Date', 'Label', 'Format', 'Catalog']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Japan', 'December 16, 1982', 'Alfa Records', 'stereo LP', 'ALR-28045']
SQL:

assistant: SELECT "Region" FROM "Table" WHERE "Format" = 'CD' AND "Date" = 'February 22, 1984';