CREATE TABLE table_22704 ("Producer" TEXT, "Product" TEXT, "Samples taken" FLOAT, "Samples failed" FLOAT, "Melamine content ( mg/kg ) " TEXT)

What are the producers of ?
SELECT "Producer" FROM table_22704 WHERE "Product" = '磊磊牌嬰幼兒配方乳粉'
SELECT "Producer" FROM "table_22704" WHERE "Product" = '磊磊牌嬰幼兒配方乳粉'