Which urban area has a population of 5.3 million?
CREATE TABLE "largest_cities" (
  "city_proper" text,
  "population_city_limits_in_millions" real,
  "density_per_km" real,
  "urban_area" text,
  "population_urban_area_in_millions" real,
  "metro_area" text,
  "population_metro_area_in_millions" text
);
SELECT "urban_area" FROM "largest_cities" WHERE "population_urban_area_in_millions"=5.3;