CREATE TABLE table_11238 ("Date" TEXT, "Visiting Team" TEXT, "Final Score" TEXT, "Host Team" TEXT, "Stadium" TEXT)

Where was the game on September 12 played when the Dallas Cowboys was the visiting team?
SELECT "Stadium" FROM table_11238 WHERE "Visiting Team" = 'dallas cowboys' AND "Date" = 'september 12'
SELECT "Stadium" FROM "table_11238" WHERE "Date" = 'september 12' AND "Visiting Team" = 'dallas cowboys'