user: Question: what is the earliest date for the album that had a catalog number of 3645, was formatted as a CD and was under the Luaka Bop label?
Columns: ['Region', 'Date', 'Label', 'Format', 'Catalog']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Worldwide', 1981.0, 'Warner Bros.', 'LP', '3645']
SQL:

assistant: SELECT MIN("Date") FROM "Table" WHERE "Catalog" = '3645' AND "Format" = 'CD' AND "Label" = 'Luaka Bop';