user: Question: What is the design when quantity is 5,000,000?
Columns: ['Date of Issue', 'Theme', 'Denomination', 'Design', 'Illustration', 'Quantity', 'Printing Process', 'Paper Type', 'First Day Cover Cancellation']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['11 January 2010', 'Definitives: Queen Elizabeth II', 'Permanent', 'Gottschalk and Ash Intl', 'Dept. of Canadian Heritage', 'Continuous Printing', 'Lithography in 5 colours', 'Tullis Russell Coatings', 'Jasper, AB']
SQL:

assistant: SELECT "Design" FROM "Table" WHERE "Quantity" = '5,000,000';