How many winners were there when the mountains classification was not awarded? 
CREATE TABLE "classification_leadership" (
  "stage" real,
  "winner" text,
  "general_classification" text,
  "points_classification" text,
  "mountains_classification" text,
  "combination_classification" text,
  "team_classification" text
);
SELECT COUNT("winner") FROM "classification_leadership" WHERE "mountains_classification"='not awarded';