What's the leader team in the Trofeo Fast Team in stage 20?
CREATE TABLE "classification_leadership_by_stage" (
  "stage" text,
  "winner" text,
  "general_classification" text,
  "points_classification" text,
  "mountains_classification" text,
  "young_rider_classification" text,
  "intergiro_classification" text,
  "trofeo_fast_team" text
);
SELECT "trofeo_fast_team" FROM "classification_leadership_by_stage" WHERE "stage"='20';