Question: The Wanhsien tiger were driven to extinction in Asia by a tiger subspecies that has been listed as Critically Endangered on the IUCN Red List since when ?

full_context: Document 1: Flat-headed cat: The flat-headed cat ("Prionailurus planiceps") is a small wild cat patchily distributed in the Thai-Malay Peninsula, Borneo and Sumatra. Since 2008, it has been listed as Endangered on the IUCN Red List due to destruction of wetlands in its habitat. It is suspected that the effective population size could be fewer than 2,500 mature individuals, with no subpopulation having an effective population size larger than 250 adult individuals.
Document 2: Wanhsien tiger: The Wanhsien tiger ("Panthera tigris acutidens"), is an extinct subspecies of tiger that lived in Asia from the late Pliocene until the middle Pleistocene. They were driven to extinction in the islands of Indonesia by another tiger subspecies, the Trinil tiger ("P. t. trinilensis") and in Asia by yet another subspecies, the South China tiger ("P. t. amoyensis")
Document 3: Trinil tiger: The Trinil tiger ("Panthera tigris trinilensis") is an extinct tiger subspecies dating from about 1.2 million years ago that was found at the locality of Trinil, Java, Indonesia. The fossil remains are now stored in the Dubois Collection of the National Museum of Natural History in Leiden, the Netherlands. Although these fossils have been found on Java, the Trinil tiger is probably not a direct ancestor of the Javan tiger. The Trinil tiger probably became extinct 50,000 years ago. The Bali tiger was also not closely related to the Trinil because of their time differences.
Document 4: Siberian Tiger Introduction Project: The Siberian Tiger Introduction Project involves reestablishing populations of the Siberian tiger ("Panthera tigris altaica)", also known as the Amur tiger, in their former range and also expanding their range by introducing them as replacements of their genetically similar relative, the extinct Caspian tiger ("Panthera tigris virgata") which inhabited Central and Western Asia. Currently, the Siberian tiger inhabits the cold mountains of the Russian Far East and northern China.
Document 5: Lion: The lion ("Panthera leo") is one of the big cats in the Felidae family and a member of genus "Panthera". It has been listed as Vulnerable on the IUCN Red List since 1996, as populations in African range countries declined by about 43% since the early 1990s. Lion populations are untenable outside designated protected areas. Although the cause of the decline is not fully understood, habitat loss and conflicts with humans are the greatest causes of concern. The West African lion population is listed as Critically Endangered since 2016. The only lion population in Asia survives in and around India's Gir Forest National Park and is listed as Endangered since 1986.
Document 6: Panthera tigris sudanensis: The Panthera tigris sudanensis is a claimed subspecies of tiger, not scientifically recognised, allegedly living in Africa. It was described in 1951 by Paul E. P. Deraniyagala, based on a fur he saw in a Cairo bazaar. When he asked the seller for information, Deraniyagala was told the animal was shot in the Sudan. As Mazák wrote in 1980, it was either a joke or the seller felt obliged to be polite and answer any question, whether with truth or an invention. Deraniyagala took a picture of the specimen's fur, which, when published, made the scientists say, according to the pattern of stripes, it was most likely a fur of the Caspian tiger ("Panthera tigris virgata") and the fur must have been smuggled from Iran or Turkey. At that time, the Caspian tiger was nearly extinct. If a photo were enough for a scientific description, "Panthera tigris sudanensis" would now be one of the Caspian tiger's synonyms; as Mazák wrote, "the situation is half-humorous, half-ironic." Tigers are not known to have ever inhabited Africa.
Document 7: South China tiger: The South China tiger ("Panthera tigris amoyensis") is a tiger subspecies in the provinces of Fujian, Guangdong, Hunan, Jiangxi in southern China. It has been listed as Critically Endangered on the IUCN Red List since 1996, and is possibly extinct in the wild since no wild individual has been recorded since the early 1970s. Already in the late 1990s, continued survival was considered unlikely due to low prey density, widespread habitat degradation and fragmentation, and other human pressures. The name "Amoy tiger" was used in the fur trade. It is also known as the "South Chinese", the "Chinese", and the "Xiamen" tiger.
Document 8: Bali tiger: The Bali tiger ("Panthera tigris balica") is an extinct tiger subspecies that lived in the Indonesian island of Bali.
Document 9: Indochinese tiger: The Indochinese tiger ("Panthera tigris corbetti") (Thai: เสือ โคร่ง อิน โด จีน , "S̄eụ̄x khor̀ng xin do cīn") (Vietnamese: "Hổ Đông Dương" ) is a tiger subspecies that lives in Myanmar, Thailand, Lao PDR, Viet Nam, Cambodia, and southwestern China. It has been listed as Endangered on the IUCN Red List since 2008, as the population seriously declined and approaches the threshold for Critically Endangered. As per 2011, the population was thought to comprise 342 individuals. The largest population unit survives in Thailand estimated at 189 to 252 individuals. There are 85 individuals in Myanmar, and only 20 Indochinese tigers remain in Viet Nam. It is considered extinct in Cambodia.
Document 10: Siberian tiger: The Siberian tiger ("Panthera tigris altaica"), also called Amur tiger, is a tiger subspecies inhabiting mainly the Sikhote Alin mountain region with a small population in southwest Primorye Province in the Russian Far East. The Siberian tiger once ranged throughout all of Korea, north-eastern China, Russian Far East, and eastern Mongolia. In 2005, there were 331–393 adult and subadult Siberian tigers in this region, with a breeding adult population of about 250 individuals. The population had been stable for more than a decade due to intensive conservation efforts, but partial surveys conducted after 2005 indicate that the Russian tiger population was declining. An initial census held in 2015 indicated that the Siberian tiger population had increased to 480–540 individuals in the Russian Far East, including 100 cubs. This was followed up by a more detailed census which revealed there was a total population of 562 wild Siberian tigers in Russia.
Document 11: Sumatran tiger: The Sumatran tiger ("Panthera tigris sumatrae") is a tiger subspecies that lives in the Indonesian island of Sumatra. It was listed as Critically Endangered on the IUCN Red List in 2008, as the population was estimated at 441 to 679 individuals, with no subpopulation larger than 50 individuals and a declining trend.
Document 12: Canis falconeri: In Eurasia during the Middle Pleistocene, Canis falconeri gave rise to the hypercarnivore genus "Xenocyon", which then gave rise to genus Cuon (the dhole) and genus Lycaon (the African hunting dog). Just before the appearance of "C. dirus", North America was invaded by genus "Xenocyon" that was as large as "C. dirus" and more hypercarnivorous. The fossil record shows them as rare and it is assumed that they could not compete with the newly derived "C. dirus". The large wolf "C. antonii" from late Pliocene to early Pleistocene China was assessed as being a variation within "C. chihliensis", and the large wolf "C. falconeri" occurred abruptly in Europe in the Early Pleistocene, perhaps representing a westward extension of "C. antonii".
Document 13: Caspian tiger: The Caspian tiger ("Panthera tigris virgata") is an extinct tiger subspecies, which inhabited the sparse forests and riverine corridors west and south of the Caspian Sea, from Turkey, Mesopotamia, Iran and the Caucasus, through Central Asia to the Takla Makan desert of Xinjiang in China, until the end of the 20th century. Depending on the region, it was also called Hyrcanian tiger, Turanian tiger, Persian tiger, and "Babre Mazandaran" (Persian: ‎ ‎ , Tiger of Mazandaran). It was one of the largest big cats to have ever lived and was described as being intermediate in size between Siberian and Bengal tigers.
Document 14: Temperate rainforests of the Russian Far East: The temperate rainforests of the Russian Far East are found within the Russian states of Primorsky Krai and Khabarovski Krai and contains the Sikhote-Alin mountain range. Found within the Russian Federation, this area is one of the most productive and diverse forests in the world and also contains one of the highest endangered species densities on Earth. While most temperate rainforests around the world have retained only a fraction of their historical range, these forests maintain the majority of their former range and almost all of their historical biodiversity. The region is also notable for having what has become the last remaining large tract of viable habitat for the critically endangered Amur tiger and Amur leopard.
Document 15: Bengal tiger: The Bengal tiger ("Panthera tigris tigris") is the most numerous of the tiger subspecies. By 2011, the total population was estimated at fewer than 2,500 individuals with a decreasing trend. None of the Tiger Conservation Landscapes within the Bengal tiger's range is considered large enough to support an effective population size of 250 adult individuals. Since 2010, it is listed as Endangered on the IUCN Red List. An example of charismatic megafauna, the Bengal tiger is the most familiar tiger subspecies, as well as the second largest
ground_truth: 1996