What is the Sets+ for Team unicaja almería where the Sets- were less than 21 and the Points+ were less than 1497?
CREATE TABLE "2012_13_season_standings" (
  "team" text,
  "sets" real,
  "sets" real,
  "points" real,
  "points" real
);
SELECT SUM("sets") FROM "2012_13_season_standings" WHERE "sets"<21 AND "team"='unicaja almería' AND "points"<1497;