Question: In what year did a micronation whose capital is Barringun, Queensland declare it's independence from Australia?

full_context: Document 1: List of micronations: Micronations, sometimes also referred to as "model countries" and "new country projects", are small, self-proclaimed entities that claim to be independent sovereign states but which are not acknowledged as such by any recognised sovereign state, or by any supranational organization. They should not be confused with microstates, which are recognised independent states of a small size, nor should they be confused with unrecognised states, which may have legitimate claim to sovereign state status.
Document 2: Erawirung: The Erawirung were a historically significant Indigenous Australian people group whose traditional territory was located in what is today South Australia.
Document 3: Butmaroo: Butmaroo is a locality near Bungendore, New South Wales. Butmaroo Homestead was occupied by the early settlers in the region and the name may have originated in the small endangered macropod Butmaroo which used to be common in the area.
Document 4: Australia: Australia ( , , ), officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands. It is the largest country in Oceania and the world's sixth-largest country by total area. The neighbouring countries are Papua New Guinea, Indonesia and East Timor to the north; the Solomon Islands and Vanuatu to the north-east; and New Zealand to the south-east. Australia's capital is Canberra, and its largest urban area is Sydney.
Document 5: List of Indigenous Australian firsts: Indigenous Australians are the original inhabitants of the Australian continent and nearby islands. The Torres Strait Islanders are indigenous to the Torres Strait Islands, which are at the northernmost tip of Queensland near Papua New Guinea. The term "Aboriginal" has traditionally been applied to indigenous inhabitants of mainland Australia, Tasmania, and some of the other adjacent islands.
Document 6: Principality of Marlborough: The Principality of Marlborough was a short-lived micronation established in 1993 located at near Marlborough, Queensland, Australia, about 200 km (124 mi) north of Rockhampton.
Document 7: Bungaroo: Bungaroo is a locality near St. Ives, Sydney, Australia. The location is thought to be the site where Governor Arthur Phillip and party camped on the night of 16 April 1788 on the first of many expeditions intended to find arable land that could supply the Colony with agricultural products. The colony at Sydney Cove was dependent on supplies from England, but the soils around the harbour were too poor to support crops and sustain the Colony. This trip is very historic for the Ku-ring-gai Shire, being when Europeans first entered there. It is very historic for the entire Colony or State, being when the Blue Mountains were first sighted. It is believed from later statements made by Governor Phillip that he realized on seeing such large mountains that they must have a large river with rich alluvial soils. Thus the day after camping at Bungaroo the Colony's ultimate survival was realized, and it would be very soon indeed that the Governor would direct endeavour westwards with major consequences. As all that unfolded, unto this day, some consider that Bungaroo is the sole place recognizable in the colonists' writings of 1788 which now remains unchanged from as it was then.
Document 8: Bingara, New South Wales: Bingara (Aboriginal for 'creek') is a small town on the Gwydir River in Murchison County in the New England region of New South Wales, Australia. In 2011, Bingara had a population of 1,093 people. and is currently the administrative centre for the Gwydir Shire that was created in 2003. It has a culturally homogeneous population as residents are mostly of Anglo-Celtic background. Only 9.4% of the population is born overseas and 3.3% is of Aboriginal or Torres Strait Islander background. It is a popular site for retirement and hence has an old population, with 53.8% aged 55 years and over, compared to the national average of 26.4%. Bingara's socioeconomic status is comparatively lower than that of Australia. Bingara is one of the few places in Australia where diamonds have been found. The Gwydir River being a main highlight of the town is a main catchment of the Murray-Darling System.
Document 9: Mungindi: Mungindi is a town and locality on the border of New South Wales (NSW) and Queensland, Australia. The town is within Moree Plains Shire in New South Wales and within the Shire of Balonne in Queensland. Within Queensland, the locality is split between the Shire of Balonne (the western part) and the Goondiwindi Region (eastern part). It possesses a New South Wales postcode. Mungindi sits on the Carnarvon Highway and straddles the Barwon River which is the border between New South Wales and Queensland. At the 2011 census , Mungindi had a population of 738 on the New South Wales side. The population on the Queensland side is now included in Thallon, which had a population, including the surrounding area, of 382.
Document 10: New South Wales: New South Wales (abbreviated as NSW) is a state on the east coast of :Australia. It borders Queensland to the north, Victoria to the south, and South Australia to the west. Its coast borders the Tasman Sea to the east. The Australian Capital Territory is an enclave within the state. New South Wales' state capital is Sydney, which is also Australia's most populous city. In March 2014 , the estimated population of New South Wales was 7.5 million, making it Australia's most populous state. Just under two-thirds of the state's population, 4.67 million, live in the Greater Sydney area. Inhabitants of New South Wales are referred to as "New South Welshmen".
Document 11: Gamilaraay: The Kamilaroi or Gamilaroi are an Indigenous Australian koori people who are from the area which extended from around Singleton in the Hunter Valley through to the Warrumbungle Mountains in the west and up through the present-day centres of Quirindi, Gunnedah, Tamworth, Narrabri, Walgett, Moree, Lightning Ridge and Mungindi in New South Wales, to Nindigully in south west Queensland. The Kamilaroi is one of the four largest indigenous nations in Australia. The Kamilaroi language is classified in the Pama–Nyungan family of Australian languages. The Kamilaroi Highway, Sydney Ferries Limited's vehicular ferry "Kamilaroi" (1901–1933), and a cultivar of Durum wheat have all been named after the Kamilaroi people.
Document 12: Murrawarri Republic: The Murrawarri Republic is a micronation that declared its independence from Australia in 2013, claiming territory straddling the border of the states of New South Wales-Queensland within Australia. The territory is the traditional homeland of the Murrawarri people, an aboriginal nation, but the majority of the population is now non-indigenous Australians. The government of Australia has not acknowledged the declaration of independence, and their independence has been wholly unrecognized.
Document 13: Murri people: The Murri are the Indigenous Australians of modern-day Queensland, North West New South Wales. Collections of tribes and extended family groups throughout geographic regions of Australia have different names, such as the Yugarabul, the Jagera peoples from Coorparoo, Kwiambal peoples from Northern New South Wales and the Koori people of parts of New South Wales and Victoria. The term is their preferred term, expressing pride in their heritage and race.
Document 14: Berry, New South Wales: Berry is a small Australian village in the Shoalhaven region of the NSW South Coast in the state of New South Wales, located 145 km south of the state capital, Sydney. It has many historical buildings which are listed on the New South Wales Heritage Register. Berry attracts many tourists who come to enjoy the diversity of landscapes, including coastal beaches, rich dairy farming, and forested mountains. The village hosts a local Produce Market which is held twice each month on the second Saturday and fourth Sunday. Berry acts as a gateway through to other towns and villages along the South Coast of NSW via the Princes Highway and the South Coast railway line. There are major highway building projects in and around Berry currently, creating motorway conditions for northward travel and bypassing the township.
Document 15: Barringun, Queensland: Barringun is a rural locality in Paroo Shire, Queensland, Australia, on the border with New South Wales. Barringun is also the capital of the self-proclaimed Murrawarri Republic.
ground_truth: 2013