What is the total population for Saint-Antoine with an area squared of 6.43?
CREATE TABLE "communities" (
  "official_name" text,
  "status" text,
  "area_km_2" real,
  "population" real,
  "census_ranking" text
);
SELECT SUM("population") FROM "communities" WHERE "official_name"='saint-antoine' AND "area_km_2">6.43;