Question: In what year was the nominate cheetah subspecies, that makes the Entabeni Game Reserve it's home, classified as Vulnerable by the IUCN?

full_context: Document 1: Acinonyx: Acinonyx is a genus within the cat family. The only living species of this genus, the cheetah, "A. jubatus", occurs and thrives in open grasslands of Africa and Asia. Though often described as a big cat, this term is used primarily to describe cats of the "Panthera" genus, ruling the cheetah out as a big cat.
Document 2: Asiatic cheetah: The Asiatic cheetah ("Acinonyx jubatus venaticus"), also known as Iranian cheetah is a Critically Endangered cheetah subspecies surviving today only in Iran.
Document 3: Serval: The serval ("Leptailurus serval"), also known as the tierboskat, is a wild cat found in Africa. It is the sole member of the genus "Leptailurus" and was first described by German naturalist Johann Christian Daniel von Schreber in 1776. Eighteen subspecies are recognised. The serval is a slender, medium-sized cat that stands at the shoulder and weighs . It is characterised by a small head, large ears, a golden-yellow to buff coat spotted and striped with black, and a short, black-tipped tail. The serval has the longest legs of any cat relative to its body size.
Document 4: South African ostrich: The South African ostrich ("Struthio camelus australis"), also known as the black-necked ostrich, Cape ostrich or southern ostrich is a subspecies of the common ostrich endemic to Southern Africa. It is widely farmed for its meat, eggs and feathers.
Document 5: Cheetah: The cheetah ("Acinonyx jubatus") is a large felid of the subfamily Felinae that occurs mainly in eastern and southern Africa and a few parts of Iran. The only extant member of the genus "Acinonyx", the cheetah was first described by Johann Christian Daniel von Schreber in 1775. The cheetah is characterised by a slender body, deep chest, spotted coat, a small rounded head, black tear-like streaks on the face, long thin legs and a long spotted tail. Its lightly built, slender form is in sharp contrast with the robust build of the big cats, making it more similar to the cougar. The cheetah reaches nearly 70 to at the shoulder, and weighs 21 - . Though taller than the leopard, it is notably smaller than the lion. Typically yellowish tan or rufous to greyish white, the coat is uniformly covered with nearly 2,000 solid black spots.
Document 6: Tsavo West National Park: Tsavo West National Park is located in the Coast Province of Kenya. The park covers an area of 9,065 square kilometres. The A109 road Nairobi-Mombasa and a railway divides it from the adjoining Tsavo East National Park. Together with adjoining ranches and protected areas, they comprise the Tsavo Conservation Area. Tsavo West is a more popular destination on account of its magnificent scenery, Mzima Springs, rich and varied wildlife, good road system, rhino reserve, rock climbing potential and guided walks along the Tsavo River. The park is operated by Kenya Wildlife Service.
Document 7: Entabeni Game Reserve: The Entabeni Game Reserve, Entabeni means 'place of the mountain', is a 220 km2 private reserve situated in the Waterberg in Limpopo Province in northern South Africa. The Entabeni Reserve is popular for safari trips because of the opportunity to see big game and a variety of birds and antelope species, as well as its beautiful scenery, and the fact that it is in a malaria-free zone. The reserve is home to Transvaal lion, African bush elephant, South African giraffe, African leopard, South African cheetah, warthog, African buffalo, hippopotamus and other safari animals in a variety of habitats.
Document 8: Meerkat: The meerkat or suricate ("Suricata suricatta") is a small carnivoran belonging to the mongoose family (Herpestidae). It is the only member of the genus Suricata. Meerkats live in all parts of the Kalahari Desert in Botswana, in much of the Namib Desert in Namibia and southwestern Angola, and in South Africa. A group of meerkats is called a "mob", "gang" or "clan". A meerkat clan often contains about 20 meerkats, but some super-families have 50 or more members. In captivity, meerkats have an average life span of 12–14 years, and about half this in the wild.
Document 9: Jungle cat: The jungle cat ("Felis chaus"), also called the reed cat or swamp cat, is a medium-sized cat native to the Middle East, South and Southeast Asia and southern China. It is a member of the genus "Felis" and was first described by Johann Anton Güldenstädt in 1776. Johann Christian Daniel von Schreber gave the jungle cat its present binomial name and is therefore generally considered as binomial authority. Ten subspecies are recognised at present.
Document 10: Nagzira: Nagzira wildlife sanctuary is located between Bhandara district and Gondia district of Maharashtra at . Nagzira Wildlife Sanctuary is locked in the arms of nature and adorned with a picturesque landscape, luxuriant vegetation and serves as a living outdoor museum to explore and appreciate nature. This sanctuary has a number of fish, 34 species of mammals, 166 species of birds, 36 species of reptiles and four species of amphibians. The invertebrate fauna includes, besides a number of insects and ant species. Wild animals found here are the tiger, Indian gaur, sambar, nilgai, chital, wild boar, sloth bear, Barking Deer, Mouse Deer and wild dog. Nearly 30,000 tourists visits this sanctuary annually. Wild animals to spot are the tiger, panther, bison, sambar, nilgai, chital, wild boar, sloth bear and wild dog. There are also tigers, leapord and one elephant named Rupa.
Document 11: Kogyae Strict Nature Reserve: Kogyae Strict Nature Reserve (or Kogyae) is a strict nature reserve, located near Kumasi, Ghana. The Kogyae Strict Nature Reserve was established in 1971 and has an area of 386 km. Animals present on the reserve include African buffalos, African civets, civet cats, and monkeys, as well as 85 species of birds. The reserve has taken the waterbuck as its symbol.
Document 12: List of birds of Gauteng: An alphabetic list of common names of birds occurring in Gauteng, South Africa. Gauteng includes both the cities of Johannesburg and Pretoria, and numerous satellite municipalities spreading over a total of some 18 000 square km and an enormous diversity of habitat, and ranging in elevation from 1300 to 1900 metres. Gauteng lies at the junction of three major biomes – grassland to the south, arid savanna to the north-west, and moist savanna to the north-east and east – this location largely accounts for its great diversity of species.
Document 13: South African cheetah: The South African cheetah ("Acinonyx jubatus jubatus"), also known as the Namibian cheetah, is the most numerous and the nominate cheetah subspecies native to Southern Africa. Since 1986, it has been classified as Vulnerable by the IUCN. The South African cheetah live mainly in the lowland areas and deserts of the Kalahari, the savannahs of Okavango Delta and the grasslands of the Transvaal region in South Africa. In Namibia, cheetahs are mostly found in farmlands. The South African cheetah was first described by the German zoologist Johann Christian Daniel von Schreber under the trinomen "Felis jubatus jubatus" in the Dutch Cape Colony in 1775.
Document 14: Chimp Eden: The Jane Goodall Institute Chimpanzee Eden, commonly referenced as Chimp Eden is a 1000 ha game reserve and animal sanctuary for rescued chimpanzees, in the Umhloti Nature Reserve, near Barberton, Mpumalanga, South Africa. Opened in 2006 by founder and director Eugene Cussons, in collaboration with the Jane Goodall Institute (JGI), its purpose is to provide a permanent and safe home for chimpanzees who are rescued from abusive and unfortunate circumstances from areas where these great apes are being constantly exploited by humans through the bushmeat trade, pet trade and entertainment industries. At the sanctuary, the chimps are rehabilitated with the help of their care takers in being re-introduced back into chimpanzee social skills such as learning how to climb trees and live in a social group with others of their own kind.
Document 15: Loch Luna Game Reserve: Loch Luna Reserve is a protected area covering the floodplain on the north side of the River Murray in South Australia between the towns of Kingston-on-Murray in the west and Cobdogla in the east. It is located about 180 km east north-east of the Adelaide city centre. It was proclaimed on 7 November 1985 with exception to a parcel of land known as Sugarloaf Hill within the boundaries of the game reserve which has been excluded from protection for the purpose of mining activity. The Moorook Game Reserve immediately adjoins the game reserve’s southern boundary. It and the Moorook Game Reserve are reported as providing "significant wildlife habitat and are popular recreation sites, particularly for river-based activities and camping." The game reserve is classified as an IUCN Category VI protected area.
ground_truth: 1986