Name the combativity award with winner of luis león sánchez
CREATE TABLE "classification_leadership" (
  "stage" text,
  "winner" text,
  "general_classification" text,
  "points_classification" text,
  "mountains_classification" text,
  "young_rider_classification" text,
  "team_classification" text,
  "combativity_award" text
);
SELECT "combativity_award" FROM "classification_leadership" WHERE "winner"='luis león sánchez';