What is teh stage with Daniele Bennati as the points classification and Giovanni VIsconti as the general classification?
CREATE TABLE "classification_leadership" (
  "stage" text,
  "general_classification" text,
  "points_classification" text,
  "mountains_classification" text,
  "young_rider_classification" text
);
SELECT "stage" FROM "classification_leadership" WHERE "points_classification"='daniele bennati' AND "general_classification"='giovanni visconti';