Which films does the actor Alla Sergiyko star in?
CREATE TABLE "stozhary_2003_prize_winners" (
  "nomination" text,
  "actors_name" text,
  "film_name" text,
  "director" text,
  "country" text
);
SELECT "film_name" FROM "stozhary_2003_prize_winners" WHERE "actors_name"='Alla Sergiyko';