user: Question: Which format had a United States region and a date of August 11, 2009?
Columns: ['Region', 'Date', 'Label', 'Format', 'Catalogue']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['United States', 'June 25, 2002', 'Reprise', 'CD', '9 48287-2']
SQL:

assistant: SELECT "Format" FROM "Table" WHERE "Region" = 'United States' AND "Date" = 'August 11, 2009';