SELECT "province" FROM table_204_704 ORDER BY "population" LIMIT 1
give the province with the least population
CREATE TABLE table_204_704 (
    id number,
    "province" text,
    "map #" number,
    "iso 3166-2:af" text,
    "centers" text,
    "population" number,
    "area (km2)" number,
    "language" text,
    "notes" text,
    "u.n. region" text
)