Question: When did the maker of the Acura Legend, the company that built Daihatsu Boon, and Nissan open US assembly plants?

Context paragraphs:
paragraph_text: The Ford Motor Company Edgewater Assembly Plant was located in Edgewater, Bergen County, New Jersey, United States. The factory began operations in 1930 and was closed in 1955, having been replaced by the Mahwah Assembly plant. The building was built in 1929 and added to the National Register of Historic Places on September 15, 1983, located at 309 River Road. The building was torn down in 2006 and replaced with a residential development.
title: Ford Motor Company Edgewater Assembly Plant
paragraph_text: Second generation Acura RDX 2013 Acura RDX Overview Production Mar 2012 -- present Model years 2013 -- present Assembly East Liberty, Ohio, United States East Liberty Auto Plant Powertrain Engine 3.0 L J30Y1 V6 (China Only) 3.5 L J35Y V6 Transmission 6 - speed automatic Dimensions Wheelbase 105.7 inches (9 foot 6 inches Length 183.7 inches (16 ft 7 inches Width 73 inches (6 foot 7 inches) Height 64.2 inches (5 foot 8 inches Curb weight 3,717 lb (1,686 kg) (FWD) 3,838 lb (1,741 kg) (AWD)
title: Acura RDX
paragraph_text: Seattle remained the corporate headquarters of Boeing until 2001, when the company separated its headquarters from its major production facilities; the headquarters were moved to Chicago. The Seattle area is still home to Boeing's Renton narrow-body plant (where the 707, 720, 727, and 757 were assembled, and the 737 is assembled today) and Everett wide-body plant (assembly plant for the 747, 767, 777, and 787). The company's credit union for employees, BECU, remains based in the Seattle area, though it is now open to all residents of Washington.
title: Seattle
paragraph_text: Some buyers lamented the small size of the first Japanese compacts, and both Toyota and Nissan (then known as Datsun) introduced larger cars such as the Toyota Corona Mark II, the Toyota Cressida, the Mazda 616 and Datsun 810, which added passenger space and amenities such as air conditioning, power steering, AM-FM radios, and even power windows and central locking without increasing the price of the vehicle. A decade after the 1973 oil crisis, Honda, Toyota and Nissan, affected by the 1981 voluntary export restraints, opened US assembly plants and established their luxury divisions (Acura, Lexus and Infiniti, respectively) to distinguish themselves from their mass-market brands.
title: 1973 oil crisis
paragraph_text: The American Thermos Bottle Company Laurel Hill Plant, located in the Laurel Hill section of Norwich, Connecticut, in the United States, includes 11 contributing buildings and two other contributing structures. The original plant was built during 1912–13 and used a historic Italianate house as a company office building. The plant was the primary factory where Thermos brand vacuum flask bottles were manufactured from 1913 to 1984. The plant is historically significant to its connection to the Thermos Company and the history of Norwich. The complex is architecturally significant because it displays the adaptive use of industrial mill design to new industry. It was added to the National Register of Historic Places in 1989.
title: American Thermos Bottle Company Laurel Hill Plant
paragraph_text: Automeccanica was a Greek automobile producing company. Founded in 1979, it was one of the companies that produced the "passenger-utility" type of vehicle popular in Greece at the time for tax categorization reasons. Its creators were former executives of "Autokinitoviomihania Ellados" (meaning 'Greek Car Industry') a company founded in 1975 to also produce vehicles of this type – it assembled Italian Fissore models based on Fiat products, as well as other Fiat models and variants. Automeccanica followed a different path, building the "Zebra" model, a passenger-utility car based on the "Daihatsu Charade", as well as assembling the "Charade" itself. In 1985, when the law favoring the "Zebra"-type vehicles changed, Automeccanica stopped its production (after about 2,000 units had been built) and started licence production of the Soviet Lada Niva model, while it developed its own cabrio-version of the car. In 1988 it acquired its former "father" company, "Autokinitoviomihania Ellados" and the latter's factory in Thiva. Automeccanica went out of the car-construction business in 1995.
title: Automeccanica
paragraph_text: The first-generation Acura RL was a rebadged version of the third-generation Honda Legend, and was first introduced to the North American market in 1996, to replace the second-generation Acura Legend. The second-generation Acura RL was a rebadged version of the fourth-generation Honda Legend, introduced to the North American market in September 2004, as a 2005 model. This iteration of the RL received an extensive mid-generational facelift for the 2009 model year, and a further update for 2011. The third-generation debuted for the 2014 model year as the Acura RLX.
title: Acura RL
paragraph_text: The Mercedes-Benz T2 was a transporter manufactured by Daimler-Benz. The T2 is also known as the "Düsseldorf transporter", since it was built in Düsseldorf from 1967 on. The third series, built from 1996 at Ludwigsfelde, was branded the Mercedes-Benz Vario. Some T2s were assembled by Mercedes-Benz España in their Alcobendas assembly plant.
title: Mercedes-Benz T2
paragraph_text: The is a subcompact car produced by Japanese automaker Daihatsu since 2004, and also sold as the . The Passo is sold at "Toyota Corolla Store" Japanese dealerships.
title: Daihatsu Boon
paragraph_text: The Acura RLX is a full-size luxury sedan manufactured by Honda and sold under their Acura division, released in 2013. Succeeding the Acura RL, the RLX offers two versions, a front-wheel drive base model equipped with Acura's Precision All-Wheel Steer (P-AWS) four-wheel steering system, and a hybrid variant featuring SH-AWD that serves as Acura's flagship. The JDM version, the Honda Legend, is only offered with the SH-AWD powertrain.
title: Acura RLX
paragraph_text: The Daihatsu Charmant is a subcompact sedan built by Daihatsu of Japan, based on the Toyota Corolla. It was replaced by the Daihatsu Applause. The Charmant was originally a spin-off of the Toyota Corolla of the 1970s; model changes paralleled those of the Corolla. All Charmants were fitted with Toyota inline-four engines, ranging from 1.2 to 1.6 litres. The word "charmant" is French for charming.
title: Daihatsu Charmant
paragraph_text: The Nissan Fuga (Japanese: 日産・フーガ "Nissan Fūga") is a mid-size luxury sedan produced by Japanese automaker Nissan since October 2004. It is built on a wider, stretched wheelbase version of the Nissan FM platform. After the Nissan Cima and Nissan President were discontinued in August 2010, the Fuga became Nissan's flagship vehicle. In North America and Europe, the Fuga is sold as the second and third-generation Infiniti M (Q70 from 2014), where it has been the flagship of the Infiniti luxury division of Nissan since 2006.
title: Nissan Fuga
paragraph_text: The Ford Richmond Plant, formally the Ford Motor Company Assembly Plant, in Richmond, California, was the largest assembly plant to be built on the West Coast and its conversion to wartime production during World War II aided the United States' war effort. The plant is part of the Rosie the Riveter/World War II Home Front National Historical Park and is listed on the National Register of Historic Places. It currently houses the National Park Service visitor center, several private businesses and the Craneway Pavilion, an event venue.
title: Ford Motor Company Assembly Plant
paragraph_text: The Acura Legend is a mid-size luxury/executive car manufactured by Honda. It was sold in the U.S., Canada, and parts of China under Honda's luxury brand, Acura, from 1985 to 1995, as both a sedan, which was classified as a full-size car, and a coupe, which was classified as a mid-size car (similar to how the Honda Accord is set up today). It was the first flagship sedan sold under the Acura nameplate, until being renamed in 1996 as the Acura 3.5RL. The 3.5RL was the North American version of the KA9 series Honda Legend.
title: Acura Legend
paragraph_text: By the early 1960s, the US had begun placing stiff import tariffs on certain vehicles. The so - called ``chicken tax ''of 1964 placed a 25% tax on imported light trucks. In response to the tariff, Toyota, Nissan Motor Co. and Honda Motor Co. began building plants in the US by the early 1980s.
title: Toyota
paragraph_text: The Infiniti J30, or Nissan Leopard J Ferie in Japan, was a rear wheel drive luxury car. The J30 went into production on April 7, 1992 as a 1993 model to replace the M30 (which was a coupe), and was launched in the United States after its competitor, the Lexus GS. The car was designed to slot between the smaller G20 and the larger Q45, as Infiniti's first mid-size sedan to compete directly with the Acura Legend. Also, it was fairly small but featured rounded styling uncharacteristic of the crowded executive car class, that is now reminiscent of a four-door coupé. Chief designer for the J30 was Jerry Hirshberg, president of Nissan Design International (NDI) and exterior designer Doug Wilson in 1988-1989. Design work was frozen in 1989. In a promotional video produced in 1994, it was referred to as a "personal luxury sedan" as attempt to define it as a four-door coupé. It has the round looks of the Nissan Altima/Bluebird U13.
title: Infiniti J30
paragraph_text: The Jonga was a Nissan designed vehicle used by the Indian Army. Jonga was an acronym for Jabalpur Ordnance aNd Guncarriage Assembly.
title: Jonga
paragraph_text: In 2002, the company closed its Valencia Street plant in San Francisco, which had opened the same year of the city's April 1906 earthquake. By the end of 2003, the closure of Levi's last U.S. factory in San Antonio ended 150 years of jeans made in the USA. Production of a few higher - end, more expensive styles of jeans resumed in the US several years later.
title: Levi Strauss & Co.
paragraph_text: BMW released the first iPod automobile interface, allowing drivers of newer BMW vehicles to control an iPod using either the built-in steering wheel controls or the radio head-unit buttons. Apple announced in 2005 that similar systems would be available for other vehicle brands, including Mercedes-Benz, Volvo, Nissan, Toyota, Alfa Romeo, Ferrari, Acura, Audi, Honda, Renault, Infiniti and Volkswagen. Scion offers standard iPod connectivity on all their cars.
title: IPod
paragraph_text: The Acura RL is a mid-sized / executive luxury car that was manufactured by the Acura division of Honda for the 1996–2012 model years over two generations. The RL was the flagship of the marque, having succeeded the Acura Legend, and was replaced in 2013 by the Acura RLX. All models of the Legend, RL and RLX lines have been adapted from the Japanese domestic market Honda Legend. The model name "RL" is an abbreviation for "Refined Luxury."
title: Acura RL

Reasoning steps:
Who made Acura Legend? >>>> Honda
What company built Daihatsu Boon? >>>> Toyota
When did Honda , Toyota and Nissan open US assembly plants? >>>> 1981

Answer: spans: 1981