user: Question: WHAT IS THE LOWEST DATE FOR Korea, IN CD FORMAT?
Columns: ['Date', 'Region', 'Label', 'Format', 'Catalog']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1976.0, 'Australia', 'CBS', 'LP', 'SBP 234929']
SQL:

assistant: SELECT MIN("Date") FROM "Table" WHERE "Region" = 'Korea' AND "Format" = 'CD';