Which Stage (Winner) has a Vladimir Karpets General classification and a Team classification of relax-gam, and a Points classification of Denis Menchov?
CREATE TABLE "jersey_progress" (
  "stage_winner" text,
  "general_classification" text,
  "mountains_classification" text,
  "points_classification" text,
  "sprints_classification" text,
  "team_classification" text
);
SELECT "stage_winner" FROM "jersey_progress" WHERE "general_classification"='vladimir karpets' AND "team_classification"='relax-gam' AND "points_classification"='denis menchov';