CREATE TABLE table_52353 ("Region" TEXT, "Date" TEXT, "Label" TEXT, "Format" TEXT, "Catalogue" TEXT)

Which format had a United States region and a date of August 11, 2009?
SELECT "Format" FROM table_52353 WHERE "Region" = 'united states' AND "Date" = 'august 11, 2009'
SELECT "Format" FROM "table_52353" WHERE "Date" = 'august 11, 2009' AND "Region" = 'united states'