What is Official Name, when Census Ranking is 769 of 5,008?
CREATE TABLE "albert_county_new_brunswick" (
  "official_name" text,
  "status" text,
  "area_km_2" real,
  "population" real,
  "census_ranking" text
);
SELECT "official_name" FROM "albert_county_new_brunswick" WHERE "census_ranking"='769 of 5,008';