What is the drawn result with a league position of 15th and a lost result that is more than 17?
CREATE TABLE "seasons_since_1970" (
  "division" text,
  "drawn" real,
  "lost" real,
  "points" real,
  "league_pos" text
);
SELECT SUM("drawn") FROM "seasons_since_1970" WHERE "league_pos"='15th' AND "lost">17;