What is the soap opera that has a duration of 13 years, with marina giulia cavalli as the actor?
CREATE TABLE "italy" (
  "actor" text,
  "character" text,
  "soap_opera" text,
  "years" text,
  "duration" text
);
SELECT "soap_opera" FROM "italy" WHERE "duration"='13 years' AND "actor"='marina giulia cavalli';