Average larger than 2,279, and a Team of queen of the south, and a Capacity larger than 6,412 has what lowest of the sum?
CREATE TABLE "attendances" (
  "team" text,
  "stadium" text,
  "capacity" real,
  "highest" real,
  "lowest" real,
  "average" real
);
SELECT SUM("lowest") FROM "attendances" WHERE "average">'2,279' AND "team"='queen of the south' AND "capacity">'6,412';