What is the total of Goals Conceded that has Points smaller than 21 and a Lost thats smaller than 8?
CREATE TABLE "apertura_2002_standings" (
  "place" real,
  "team" text,
  "played" real,
  "draw" real,
  "lost" real,
  "goals_scored" real,
  "goals_conceded" real,
  "points" real
);
SELECT SUM("goals_conceded") FROM "apertura_2002_standings" WHERE "points"<21 AND "lost"<8;