What is Date, when Effect is "Shot Down", and when Place is "South of Stanley Airport"?
CREATE TABLE "enemy_aircraft_shot_down_or_disabled_by_" (
  "pilot" text,
  "date" text,
  "place" text,
  "weapon" text,
  "effect" text
);
SELECT "date" FROM "enemy_aircraft_shot_down_or_disabled_by_" WHERE "effect"='shot down' AND "place"='south of stanley airport';