Question: Jeep Gladiator is based on this car that was sold and produced from 1963 to when?
Context: The SJ series Jeep Cherokee is a full-size SUV that was produced from 1974 through 1983 by Jeep.  It was based on the Wagoneer that was originally designed by Brooks Stevens in 1963. The Jeep Wagoneer is the first luxury 4x4, sold and produced for Jeep through numerous marques from 1963 to 1991.  A "sport utility vehicle" (SUV) for decades before the term was coined, the 4WD Wagoneer saw only minor mechanical changes during its 28-year plus production run, the third longest in U.S. automotive history. The Jeep Renegade (BU) is a subcompact crossover SUV (mini SUV in Europe) produced by Jeep.  It is built in Melfi, Italy (alongside the related Fiat 500X); Goiana, Brazil (alongside the recently launched Fiat Toro); and in Guangzhou, China.  It was first shown to the public in March 2014 at the Geneva Motor Show and mass-production started in late August of that year.  The Renegade is the first Jeep product to be produced exclusively outside of North America and is sold on the South African, European, North American, Brazilian, and Chinese Markets. The Jeep Liberty (KJ), or Jeep Cherokee (KJ) outside North America, is a compact SUV that was produced by Jeep and designed by Bob Boniface through early 1998.  Introduced in May 2001 for the 2002 model year as a replacement for the Cherokee (XJ), the Liberty was priced between the Wrangler and Grand Cherokee.  It was the smallest of the 4-door Jeep SUVs up until the car platform based 4-door Compass and Patriot arrived for 2007.  The Liberty featured unibody-construction.  It was assembled at the Toledo North Assembly Plant in the United States, as well as in other countries including Egypt and Venezuela. The Jeep Gladiator (or Jeep Pickup) is a full-size pickup truck based on the large SJ (Jeep Wagoneer) platform that was built and sold under numerous marques from 1962 to 1988.  The Jeep pickup design was noteworthy for being in production for more than 26 years with only minor mechanical changes.  The Gladiator was the basis of the first post-war U.S. Army trucks designed to be civilian vehicles and adapted to military use.  Numerous versions of the Jeep pickup were built in other markets, including Mexico by Vehículos Automotores Mexicanos. The Kaiser Jeep M715 is an American wheeled military vehicle based upon the civilian Jeep Gladiator.  In 1965 the design and developing for the M715 began.  The U.S. government purchased these trucks to replace the M37.  Between 1967 and 1969 over 33,000 trucks were produced at the Toledo, Ohio, plant.  The overhead cam 6 cyl engines were not very reliable due to lack of knowledge on the overhead cam design and lack of maintenance.  They had been dropped from civilian models by 1968.  The trucks were replaced by the Dodge M880 series. The Jeep Liberty, or Jeep Cherokee (KJ/KK) outside North America, is a compact SUV that was produced by Jeep for the model years 2002–2012.  Introduced as a replacement for the Cherokee (XJ), the Liberty was priced between the Wrangler and Grand Cherokee.  It was the smallest of the 4-door Jeep SUVs until the car based 4-door Compass and Patriot arrived for 2007.  The Liberty featured unibody-construction.  It was assembled at the Toledo North Assembly Plant in the United States, as well as in other countries including Egypt and Venezuela.  The Liberty ceased production on August 16, 2012.  The next generation restored the previous nameplate of Jeep Cherokee that was always used outside of North America. The Private Gladiator is a pornographic trilogy ("Private Gladiator", "Private Gladiator: In the City of Lust" and "Private Gladiator: Sexual Conquest", length 115 minutes), directed by Antonio Adamo and produced by Private Media Group.  It is one of the most expensive in the world of its genre.  Also, unlike most adult films based on mainstream films, it is not a parody, but rather a straightforward remake of Ridley Scott's 2000 film "Gladiator".  "The Private Gladiator" trilogy was produced on November 28, 2001, total length - 351 minutes.  It won the 2003 AVN award for Best Foreign Feature. The Jeep Willys2 is a concept car made by the Chrysler Group.  It was presented at the 2001 Tokyo Auto Show.  It is based on the Willys MB.  The Willys2 uses frame web technology and a one-piece carbon-fiber body.  It looks like a newer, meaner version of the Liberty.  The Willys2 took many design cues from other Jeep models such as the special seven-slot grille and trapezoidal wheel arches.  The Willys2 weighs about 3000 pounds with its removable carbon-fiber top.  Its 160-hp I4 engine can accelerate it from 0 to 60 mph in 10 seconds, to a top speed of about 90 mph.  The interior is all plastic, and it is possible to clean the interior by spraying it with water.  Part of the design of the Willys2 was incorporated into the Jeep Liberty. The Chinese BAW Beijing BJ212 (Chinese: 北京212) and BAW BJ2020 is a Land Rover and Jeep inspired four-wheel drive, originally a 2445cc 4 cylinder gas-engine powered (4 cylinder diesel engines were added in the 2000s) light-duty offroad utility vehicle in the half tonne class, built by Beijing Automobile Works.  The original design, depending in large on Russian off-roaders from UAZ and possibly developed in conjunction with the UAZ-469, debuted in 1965 as the Beijing BJ212.  It has been known as the BJ2020 series since the Chinese car classification system was changed in 1989.  It is commonly used by the Chinese government (particularly the armed forces), but is also commercially available.  Various versions of the Jeep are today sold under the names of Zhanqi, Jinxuanfeng, Lieying, City Cruiser, Kuangchao, and Ludi.  The BJ212 and its successors has a long history of use by the People's Liberation Army.
Answer: 1991