what is the lowest vuelta wins when the rank is 19 and combo is more than 0?
CREATE TABLE "per_country" (
  "rank" text,
  "country" text,
  "jerseys" real,
  "vuelta_wins" real,
  "points" real,
  "combo" real,
  "different_holders" real
);
SELECT MIN("vuelta_wins") FROM "per_country" WHERE "rank"='19' AND "combo">0;