Question: Kentucky Truck Assembly is one of two plants operated by Ford in Louisville, the other being the plant that opened on 180 acres in what year?

Context paragraphs:
Oshawa Truck Assembly: Oshawa Truck Assembly was a General Motors Canada truck factory in Oshawa, Ontario, Canada.  It opened in its original location in downtown Oshawa in 1918 in order to build ambulances for World War I and Chevrolet vehicles before it merged with GM.  The plant later moved to the GM Autoplex facilities south of the city, and closed in 2009.  GM Autoplex also included Oshawa Car Assembly and a now-closed battery plant.

Kentucky Truck Assembly: Kentucky Truck Plant is an automobile manufacturing plant owned by Ford Motor Company in Louisville, Kentucky.  The 4626490 sqft plant on 500 acre opened in 1969 and currently employs 8500 people total.  It is located at 3001 Chamberlain Lane in the Northeast corner of the city.  Ford also operates another plant in Louisville, the Louisville Assembly Plant.

St. Louis Truck Assembly: St. Louis Truck Assembly was a General Motors automobile factory that built GMC/Chevrolet trucks, GM "A" body passenger cars, the Chevrolet Nova, and 1954-1981 Corvette models.  Opened in the 1920s, it closed on August 7, 1986, although the plant essentially was doomed when on August 1, 1981 one assembly line was closed and Corvette production was shifted to Bowling Green Assembly Plant in Kentucky Thereafter, it only built R- and V-series crew cab and cab/chassis trucks before that output was moved to GM's Janesville Assembly.  Automobile production was transferred to the new Wentzville Assembly in 1986.

Louisville Assembly Plant: The Louisville Assembly Plant is an automobile manufacturing plant owned by Ford Motor Company in Louisville, Kentucky.  The 3154173 sqft plant on 180 acres opened in 1955 and currently employs a total of 4,554 people.  It is located adjacent to the Louisville International Airport on the south side of the city.  Ford also operates another plant in Louisville, Kentucky Truck Assembly.  The plant houses approximately 20.1 mi of conveyor belts.

Warren Truck Assembly: Warren Truck Assembly is a Chrysler automobile factory in Warren, Michigan.  The factory opened in 1938.  The nearby Warren Stamping opened in 1949 and just south of Eight Mile Road, the Mound Road Engine plant opened in 1953.  There also was once the nearby Sherwood Assembly that closed in the late 1970s when Chrysler halted production of the Dodge Medium and Heavy Duty trucks and exited the market.  It was located on the southwest corner of 9 Mile Road and Sherwood, adjacent to the Warren Assembly site on the east.

Buffalo Stamping Plant: Buffalo Stamping Plant manufactures sheetmetal stampings and welded sub-assemblies for Ford Motor Company's automotive car and truck assembly plants in the USA, Canada and Mexico.  The facility was opened in 1950 with 1235895 sqft of working floor space.  It has had six major expansions and the facility is now at 2452883 sqft or 53.3 acre of floor space.  Buffalo stamping is currently in the process of adding 30,000 square feet on to the structure.

Edison Assembly: Edison Assembly, also known as Metuchen Assembly, was a Ford Motor Company manufacturing plant in Edison, New Jersey.  It was located at 939 U.S. Route 1 and occupied over 100 acres when it was open.  The factory began operations in 1948 and was closed in 2004.  Several popular Ford products were manufactured there, such as the Ford Mustang, Ford Ranger, and the Ford Pinto.  When the plant opened in 1948, it manufactured the new Mercury branded and Lincoln vehicles.  It was one of three Ford manufacturing facilities in New Jersey and was built two years before the Mahwah Assembly plant was opened in 1950.

Safari World: Safari World is a tourist attraction in Bangkok, Thailand that consists of two parks named Marine Park and Safari Park, operated by Safari World Public Limited.  The park was opened in 1988 with a total area of 480 acres for its open zoo and 180 acres for its bird park.  A major renovation to enhance effectiveness of land use began on 17 April 1989 and its total area developed for the leisure park now consists of an open zoo and a marine park on 500 rai (approximately 200 acres) of land.

Warren Stamping Plant: The Warren Stamping Plant is a Chrysler automobile factory in Warren, Michigan.  The factory was completed in 1948 and began production in 1949.  Nearby Chrysler facilities include the Warren Truck Assembly and the Mound Road Engine plant.  There also was once the nearby Sherwood Assembly that closed in the late 1970s when Chrysler halted production of the Dodge Medium and Heavy Duty trucks and exited the market.  Sherwood Assembly has since been torn down.

Wayne, Michigan: Wayne is a city in Wayne County in the state of Michigan, west of Detroit.  As of the 2010 census, the city population was 17,593.  Wayne has a long history of automotive and transportation related manufacturing.  Ford Motor Company currently has two plants here; Wayne Stamping & Assembly and the Michigan Assembly Plant, formerly known as the Michigan Truck Plant.

Supporting paragraphs: Kentucky Truck Assembly Louisville Assembly Plant
Answer: 1955