What is the sum of matches played that has a year of first match before 2000, fewer than 21 lost, and 0 drawn?
CREATE TABLE "rugby_belgium_internationals_1986" (
  "first_game" real,
  "played" real,
  "drawn" real,
  "lost" real,
  "percentage" text
);
SELECT SUM("played") FROM "rugby_belgium_internationals_1986" WHERE "first_game"<2000 AND "lost"<21 AND "drawn"<0;