Question: When did the amusement park where Bukh & Gry showed their only automobile open?

full_context: Document 1: Axeltorv: Axeltorv is a public square in central Copenhagen, Denmark, located across the street from Tivoli Gardens' main entrance on Vesterbrogade.
Document 2: Trolley park: In the United States, trolley parks, which started in the 19th century, were picnic and recreation areas along or at the ends of streetcar lines in most of the larger cities. These were precursors to amusement parks. These trolley parks were created by the streetcar companies to give people a reason to use their services on weekends. These parks originally consisted of picnic groves and pavilions, and often held events such as dances, concerts and fireworks. Many eventually added features such as swimming pools, carousels, Ferris wheels, roller coasters, sports fields, boats rides, restaurants and other resort facilities to become amusement parks. Various sources report the existence of between 1,500 and 2,000 amusement parks in the United States by 1919.
Document 3: Bukh &amp; Gry: The Bukh & Gry was a Danish automobile manufactured in 1904. Its creators, Jens Bukh and John Gry., had both worked in the American automotive industry; together they built only one car, manufactured at Horve and shown at the Tivoli Gardens in Copenhagen in 1905. This model had a water-cooled 10/12 hp two-cylinder engine and friction drive; no further cars were built.
Document 4: Dymaxion car: The Dymaxion car was designed by American inventor Buckminster Fuller during the Great Depression and featured prominently at Chicago's 1933-1934 World's Fair. Fuller built three experimental prototypes with naval architect Starling Burgess — using gifted money as well as a family inheritance — to explore not an automobile per se, but the 'ground-taxiing phase' of a vehicle that might one day be designed to fly, land and drive — an "Omni-Medium Transport". Fuller associated the word "Dymaxion" with much of his work, a portmanteau of the words dynamic", maximum", and "tension", to summarize his goal to do more with less.
Document 5: Elitch Gardens: Elitch Gardens was a family-owned seasonal amusement park, theater, and botanic garden in the West Highland neighborhood in northwest Denver, Colorado, United States at 38th and Tennyson streets. For more than a century Elitch's was one of the most popular entertainment destinations in Colorado. It was nationally known for its luscious gardens, the Trocadero Ballroom, the Theatre at the Gardens and the premier wooden roller coaster, Mister Twister. The park moved to downtown Denver in 1994 and later became Six Flags Elitch Gardens (now simply Elitch Gardens once again). The former location has been redeveloped.
Document 6: Tokyo Dome City Attractions: Tokyo Dome City Attractions (東京ドームシティアトラクションズ ) is an amusement park located next to the Tokyo Dome in Bunkyō, Tokyo, Japan, and forms a part of the Tokyo Dome City entertainment complex. It opened in 1958, and was formerly known as Kōrakuen (後楽園ゆうえんち ) until April 2003. It was one of the most popular amusement parks in Tokyo. Rides include the "Big O" Ferris wheel and "Thunder Dolphin" roller coaster.
Document 7: Lakeside Amusement Park: Lakeside Amusement Park is a family-owned amusement park in Lakeside, Colorado adjacent to Denver. Originally named White City, it was opened in 1908 as a popular amusement resort adjacent to Lake Rhoda spearheaded by prominent Denver brewer Adolph Zang. Eventually the name was changed to Lakeside Amusement Park, but the local populace kept referring to it by its original name for its glittering original display of over 100,000 lights. Today it is one of the oldest amusement parks in the United States, and the oldest still running in Colorado. The park, comprising nearly half of the Town of Lakeside that it was responsible for creating in 1907, features the landmark Tower of Jewels.
Document 8: Gräf &amp; Stift: Gräf & Stift was an Austrian manufacturer of automobiles, trucks, buses and trolleybuses, from 1902 until 2001, latterly as a subsidiary of MAN. Founded in 1902 by the brothers Franz, Heinrich and Karl Gräf, and the investor, Wilhelm Stift. Before the Second World War, the company was a well-known manufacturer of luxury automobiles, including the Double Phaeton that carried Archduke Franz Ferdinand and his wife, Sophie, when they were assassinated in Sarajevo in June 1914. By the 1930s Gräf & Stift had begun making trucks and buses, and it ceased car manufacturing in 1938. The company merged with Österreichische Automobil Fabriks-AG (ÖAF) in 1971, becoming ÖAF-Gräf & Stift AG, and later the same year was taken over by MAN AG. It continued in business as a subsidiary of MAN, and the Gräf & Stift name remained in use as a MAN brand for the Austrian market and for trolleybuses until 2001, when ÖAF-Gräf & Stift AG was renamed MAN Sonderfahrzeuge AG. It was located in Vienna, and the production facilities continue in use there, but no longer using the Gräf & Stift name.
Document 9: Burton (car): The Burton is a Dutch sports car based on French 2CV technology. The Burton is an open, nostalgic-looking sports car built on the chassis of the 2CV with a modern glassfibre bodykit. The car can be built as an open two seater, or with a hardtop with gull-wing doors or with a custom made convertible roof. From the beginning of 2002 the Burton is available all over Europe.
Document 10: Gray (automobile): The Gray was an automobile manufactured in Detroit, Michigan by the Gray Motor Corporation from 1922-26. The Gray Motor Corporation produced two models, the Star and Gray. They were an attempt to win a share of the mass market dominated by Ford Model T. Many of the employees of Gray, were former Ford employees, including the head of Gray Corporation, Frank L. Klingensmith, who was the former vice president and treasurer of Ford Motor Company. The vehicles had similar features of engine and chassis to the Model T. The engine had a side-valve, four-cylinder 2.7 litre configuration. The suspension used a conventional quarter-elliptical spring at the front and rear. Front-wheeled brakes were offered in 1926, the last year of production. They planned on production of nearly a quarter of a million a year the first year, but those volumes were never realized. The touring car cost $490, and the coach was sold at $760, the first year of production.
Document 11: Griffin Auto Company Building: The Griffin Auto Company Building is a historic automobile sales and service facility at 117 East Locust Street in El Dorado, Arkansas. It is a single story structure built out of reinforced concrete, with a full basement. The main floor housed the sales and showroom area, and the service area was in the basement. The building also includes a filling station area, which is the most decorative portion of the otherwise utilitarian structure. This area has pilastered columns that frame the automobile entry area, and the walls above the shelter entrance is decorated with bands of terra cotta and brick ornamentation. The Griffin Auto Company was established by three brothers from North Carolina, beginning as a livery stable business in 1899 before branching out into the new world of the automobile in 1915. They moved out of the building in 1960, since when it has been used by a variety of other sales-oriented businesses.
Document 12: Jordan Motor Car Company: The Jordan Motor Car Company was founded in 1916 in Cleveland, Ohio by Edward S. "Ned" Jordan, a former advertising executive from Thomas B. Jeffery Company of Kenosha, Wisconsin. The factory produced what were known as "assembled cars" until 1931, using components from other manufacturers. Jordan cars were noted more for attractive styling than for advanced engineering, although they did bring their share of innovations to the marketplace. Not surprisingly, the company's advertising was often more original than the cars themselves. Said Jordan, “Cars are too dull and drab.” He reasoned that since people dressed smartly, they were willing to drive “smart looking cars” as well.
Document 13: Ambi Budd: Budd was a company founded by Edward Gowen Budd in Philadelphia, USA. Budd studied at the University of Pennsylvania and his first work was at a company making automobile wheels from pressed steel rather than by casting. Steel-shaping technology progressed rapidly at the time and soon the company also made parts like doors and front walls in pressed steel. In 1912, Budd started his own company after he found out how to make complex shaped parts in pressed steel. The company's chief engineer was Joseph Ledwinka, a relative of Hans Ledwinka. The company managed to land several large orders like an all-steel body for Buick and 2000 Oakland superstructures. Later Budd also made bodies for Cadillac, Chrysler, Delage, Citroën, Mercedes, Morris and Nash as well as the doors of the Ford Model T. In 1916 Budd also started the Budd Wheel Company making wheels for Dodge. In 1935 they made ventilated disc brakes, first for racing, but later also for passenger cars.
Document 14: Amusement park: An amusement park is a park that features various attractions, such as rides and games, as well as other events for entertainment purposes. A theme park is a type of amusement park that bases its structures and attractions around a central theme, often featuring multiple areas with different themes. Unlike temporary and mobile funfairs and carnivals, amusement parks are stationary and built for long-lasting operation. They are more elaborate than city parks and playgrounds, usually providing attractions that cater to a variety of age groups. While amusement parks often contain themed areas, theme parks place a heavier focus with more intricately-designed themes that revolve around a particular subject or group of subjects.
Document 15: Tivoli Gardens: Tivoli Gardens (or simply Tivoli) is a famous amusement park and pleasure garden in Copenhagen, Denmark. The park opened on 15 August 1843 and is the second-oldest operating amusement park in the world, after Dyrehavsbakken in nearby Klampenborg, also in Denmark.
ground_truth: 15 August 1843