What is the smallest amount sampled of product 蒙牛牌嬰幼兒配方乳粉 ?
CREATE TABLE "tests_conducted_by_aqsiq" (
  "producer" text,
  "product" text,
  "samples_taken" real,
  "samples_failed" real,
  "melamine_content_mg_kg" text
);
SELECT MIN("samples_taken") FROM "tests_conducted_by_aqsiq" WHERE "product"='蒙牛牌嬰幼兒配方乳粉';