user: Question: What region has the catalog SIR021-6?
Columns: ['Region', 'Date', 'Label', 'Format', 'Catalog']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Netherlands', 'April 19, 2004', 'Magik Muzik', 'vinyl , 12"', 'Magik Muzik 817-5']
SQL:

assistant: SELECT "Region" FROM "Table" WHERE "Catalog" = 'SIR021-6';