What is the LGA name where the 2006 census population is bigger than 425208.9417698913 and administrative capital is port harcourt?
CREATE TABLE "administrative_divisions" (
  "lga_name" text,
  "area_km_2" real,
  "census_2006_population" real,
  "administrative_capital" text,
  "postal_code" real
);
SELECT "lga_name" FROM "administrative_divisions" WHERE "census_2006_population">425208.9417698913 AND "administrative_capital"='Port Harcourt';