CREATE TABLE "classification_leadership" (
  "stage" real,
  "winner" text,
  "general_classification" text,
  "points_classification" text,
  "mountains_classification" text,
  "young_rider_classification" text,
  "team_classification" text,
  "combativity_award" text
);

Question: Who led the points classification when Roman Kreuziger led the young rider classification?
SQL: SELECT "points_classification" FROM "classification_leadership" WHERE "young_rider_classification"='Roman Kreuziger';

Question: Who won the stage when Fumiyuki Beppu won the combativity award?
SQL: SELECT "winner" FROM "classification_leadership" WHERE "combativity_award"='Fumiyuki Beppu';

Question: Who won stage 18?
SQL: SELECT "winner" FROM "classification_leadership" WHERE "stage"=18;

Question: Who won the stage when Mark Cavendish led the points classification, Rinaldo Nocentini led the general classification, and the stage was less than 11.0?
SQL: SELECT "winner" FROM "classification_leadership" WHERE "points_classification"='Mark Cavendish' AND "general_classification"='Rinaldo Nocentini' AND "stage"<11.0;