CREATE TABLE table_63841 ("Region" TEXT, "Date" TEXT, "Label" TEXT, "Format" TEXT, "Catalog" TEXT)

What is the Label of the September 20, 2008 release with Catalog number RTRADCD491?
SELECT "Label" FROM table_63841 WHERE "Catalog" = 'rtradcd491' AND "Date" = 'september 20, 2008'
SELECT "Label" FROM "table_63841" WHERE "Catalog" = 'rtradcd491' AND "Date" = 'september 20, 2008'