What is the swimsuit number when the preliminary is 8.721, and the average is more than 8.781?
CREATE TABLE "final_competition_score" (
  "country" text,
  "preliminary" real,
  "interview" real,
  "swimsuit" real,
  "evening_gown" real,
  "average" real
);
SELECT COUNT("swimsuit") FROM "final_competition_score" WHERE "preliminary"=8.721 AND "average">8.781;