CREATE TABLE table_36338 ("Volume" TEXT, "Discs" FLOAT, "Episodes" FLOAT, "Region 1 release" TEXT, "Region 2 release" TEXT, "Region 4 release" TEXT)

What is the region 4 release that has july 20, 2009 as the region 2?
SELECT "Region 4 release" FROM table_36338 WHERE "Region 2 release" = 'july 20, 2009'
SELECT "Region 4 release" FROM "table_36338" WHERE "Region 2 release" = 'july 20, 2009'