user: Question: Which Catalog was formated as a CD under the label Alfa Records?
Columns: ['Region', 'Date', 'Label', 'Format', 'Catalog']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Japan', 'September 10, 1985', 'Alfa Records', 'stereo LP', 'ALR-28071']
SQL:

assistant: SELECT "Catalog" FROM "Table" WHERE "Label" = 'Alfa Records' AND "Format" = 'CD';