Who won when robert kudelski finished with under 13 weeks?
CREATE TABLE "seasons" (
  "season" text,
  "num_of_stars" real,
  "num_of_weeks" real,
  "season_premiere_date" text,
  "season_finale_date" text,
  "winner" text,
  "runner_up" text,
  "third_place" text
);
SELECT "winner" FROM "seasons" WHERE "num_of_weeks"<13 AND "third_place"='robert kudelski';