CREATE TABLE table_28441 ("Name" TEXT, "Original Club" TEXT, "Stadium" TEXT, "City" TEXT, "Country" TEXT, "Sport" TEXT, "Founded" FLOAT, "Reason for foundation with source" TEXT)

How many clubs were founded in the westfalenstadion stadium?
SELECT COUNT("Founded") FROM table_28441 WHERE "Stadium" = 'Westfalenstadion'
SELECT COUNT("Founded") FROM "table_28441" WHERE "Stadium" = 'Westfalenstadion'