What is the name of the corporation that incorporated on october 15, 1955?
CREATE TABLE "list" (
  "name" text,
  "corporate_name" text,
  "regional_district" text,
  "incorporation_date_city" text,
  "population_2011" real,
  "population_2006" real,
  "change_pct" text,
  "area_km" text,
  "population_density" text
);
SELECT "corporate_name" FROM "list" WHERE "incorporation_date_city"='October 15, 1955';