What is the date with the distance of km (mi) at the course of roccaraso to san giorgio del sannio?
CREATE TABLE "stage_results" (
  "date" text,
  "course" text,
  "distance" text,
  "type" text,
  "winner" text
);
SELECT "date" FROM "stage_results" WHERE "distance"='km (mi)' AND "course"='roccaraso to san giorgio del sannio';