Question: In what year was the motorsport team that manufactured the Ligier JS4 founded?

full_context: Document 1: Renault in Formula One: Renault are currently involved in Formula One as a constructor, under the name of Renault Sport Formula One Team. They have been associated with Formula One as both constructor and engine supplier for various periods since 1977. In 1977, the company entered Formula One as a constructor, introducing the turbo engine to Formula One in its first car, the Renault RS01. In 1983, Renault began supplying engines to other teams. Although the Renault team won races and competed for world titles, it withdrew at the end of . Renault continued supplying engines to other teams until 1986, then again from 1989 to 1997.
Document 2: Ligier JS31: The Ligier JS31 was a Formula One car designed by Michel Tétu and Michel Beaujon for the Ligier team for use in the 1988 Formula One season. It was powered by the new, normally aspirated, 3.5L Judd CV V8 engine and, like the rest of the F1 grid in 1988, ran on Goodyear tyres. Drivers for the team were French veteran René Arnoux in his 3rd season driving for team boss Guy Ligier, and Swede Stefan Johansson who had finished 5th in the World Championship with Ferrari in and 6th with McLaren in .
Document 3: Oreca: ORECA (Organisation Exploitation Compétition Automobiles) is a French racing team, founded in 1973 and run by Hugues de Chaunac, former team manager of F1 team AGS. Oreca has had success in many areas of motorsport. Since the early 1990s the team has concentrated on running sports cars and GT cars.
Document 4: Ligier JS17: The Ligier JS17 was a Formula One car designed by Gérard Ducarouge and Michel Beaujon for use by the Ligier team during the season. Powered by a Talbot-badged Matra V12, the JS17 was driven to two Grand Prix wins by Jacques Laffite. It was updated to JS17B specification for the season until it was replaced later that year by the JS19.
Document 5: Ligier JS23: The Ligier JS23 was a Formula One car designed by Michel Beaujon and Claude Galopin for the Ligier team for use in the 1984 Formula One season. The car was powered by a turbocharged Renault V6 engine and ran on Michelin tyres. Drivers of the car during 1984 were François Hesnault and Andrea de Cesaris.
Document 6: Courage Compétition: Courage Compétition was a racing team and chassis constructor company now owned by Oreca, based in Le Mans, France near the Circuit de la Sarthe. It was founded by Yves Courage, a French race driver who ran hillclimbs before founding the company. Following the purchase of Courage by Oreca in 2007, Yves Courage has refounded the company as Courage Technology in 2010, attempting to develop electric racing cars.
Document 7: Equipe Ligier: Equipe Ligier is a motorsport team, best known for its Formula One team that operated from to . The team was founded in 1968 by former French rugby union player Guy Ligier as a sports car manufacturer.
Document 8: Brabham: Motor Racing Developments Ltd., commonly known as Brabham , was a British racing car manufacturer and Formula One racing team. Founded in 1960 by two Australians, driver Jack Brabham and designer Ron Tauranac, the team won four Drivers' and two Constructors' World Championships in its 30-year Formula One history. Jack Brabham's 1966 Drivers' Championship remains the only such achievement using a car bearing the driver's own name.
Document 9: Ligier JS29: The Ligier JS29 was a Formula One car designed by Michel Tétu and Michel Beaujon for the Ligier team for use in the season. It was originally developed for use with an Alfa Romeo turbo power plant but prior to the start of the season, Ligier lost the use of the engine. The car had to be re-designed around a Megatron Straight 4 turbo engine. Redesignated the JS29B, it scored a single point during the season when driver Rene Arnoux finished 6th in the Belgian Grand Prix. Later in the season, the car was further refined to a JS29C specification.
Document 10: Arola (microcar): Arola SARL was a small manufacturing company based in Lyon-Corbas, France, which manufactured a range of microcars, designed to be driven without a licence. Arola became part of the Aixam group in 1983.
Document 11: Ligier JS25: The Ligier JS25 was a Formula One car designed by Michel Beaujon and Claude Galopin for use by the Ligier team during the 1985 Formula One season. Like its predecessor, the JS23, the JS25 was powered by a turbocharged Renault V6 engine although the car ran on Pirelli instead of Michelin tyres after the French company pulled out of Grand Prix racing at the end of . Drivers of the car were initially their driver Andrea de Cesaris and veteran Jacques Laffite who returned to the team after two fruitless years at Williams, but after a series of crashes, de Cesaris was fired by team boss Guy Ligier and replaced by Philippe Streiff.
Document 12: Ligier JS4: The Ligier JS4 is a four-wheeled, two-seater microcar manufactured from 1980 to 1983 by Ligier, the street vehicle branch of French Formula One manufacturer Equipe Ligier. It marked a change in Ligier's priorities as they had recently ended manufacture of the Ligier JS2 sports car. It is a "Voiture sans permit", a light vehicle which did not require a driver's license and was thus popular with the elderly, the young, or with those who had lost theirs. It was first presented on 25 July 1980.
Document 13: Olympique Lyonnais (Superleague Formula team): Olympique Lyonnais Superleague Formula team is the racing team of Olympique Lyonnais, a football team that competes in France in the Ligue 1. The Olympique Lyonnais racing team competes in the Superleague Formula. It will make its debut in the 2009 season and be operated by Barazi-Epsilon.
Document 14: Jota Sport: Jota Sport is a British sports car racing team. Founded as Team Jota by Sam Hignett and John Stack, Jota Sport is part of the Jota Group which is owned by Sam Hignett, Simon Dolan and David Clark. The team is based in the Kent countryside. Jota Sport has won the LMP2 class at the 2014 24 Hours of Le Mans race, and finished in second position in the same class the following year. s of 2017 it competes, in partnership with Arden International and Jackie Chan DC Racing, in the FIA World Endurance Championship with two ORECA 07 LMP2 cars.
Document 15: Pescarolo Sport: Pescarolo Sport was a motorsport team based in Le Mans, France and founded in February 2000 by French racing driver Henri Pescarolo and his friend and partner, French publisher François Granet. They race in the Le Mans Series and the 24 Hours of Le Mans. In October 2007, Henri Pescarolo purchased Jacques Nicolet's Saulnier Racing and created Pescarolo Automobiles, with the racing team becoming a division of the new company. The Pescarolo Automobiles went into receivership on 15 June 2010. Following a liquidation sale, the company was resold back to Henri Pescarolo and rebranded as Pescarolo Team for the 2011 season. However, the team's financial situation did not improve, and was wound up in January 2013.
ground_truth: 1968