How many sprint classifications are there where marco frapporti is the winner?
CREATE TABLE "classification_leadership" (
  "stage" real,
  "winner" text,
  "general_classification" text,
  "sprint_classification" text,
  "mountains_classification" text,
  "points_classification" text,
  "team_classification" text
);
SELECT COUNT("sprint_classification") FROM "classification_leadership" WHERE "winner"='Marco Frapporti';