How many teams have a combination classification of Alejandro Valverde and a Points classification of Alessandro Petacchi?
CREATE TABLE "jersey_progress" (
  "stage" real,
  "winner" text,
  "general_classification" text,
  "points_classification" text,
  "mountains_classification" text,
  "combination_classification" text,
  "team_classification" text
);
SELECT COUNT("team_classification") FROM "jersey_progress" WHERE "combination_classification"='Alejandro Valverde' AND "points_classification"='Alessandro Petacchi';