What is the number of appearances where the most recent final result is 1999, beat Genk 3-1?
CREATE TABLE "performance_by_club" (
  "team" text,
  "num_appearances" real,
  "years_won_in_bold" text,
  "num_wins" real,
  "num_runner_up" real,
  "most_recent_final" text
);
SELECT COUNT("num_appearances") FROM "performance_by_club" WHERE "most_recent_final"='1999, beat Genk 3-1';