Question: When did the roof gardens above the district where Ivy Duke was born open to the public?

full_context: Document 1: Department store: The design and function of department stores in Germany followed the lead of London, Paris and New York. Germany used to have a number of department stores; nowadays only a few of them remain. Next to some smaller, independent department stores these are Karstadt (in 2010 taken over by Nicolas Berggruen, also operating the KaDeWe in Berlin, the Alsterhaus in Hamburg and the Oberpollinger in Munich), GALERIA Kaufhof (part of the Metro AG). Others like Hertie, Wertheim and Horten AG were taken over by others and either fully integrated or later closed.
Document 2: Ivy Dickens: Ivy Dickens (former alias: Charlotte ``Charlie ''Rhodes) is a fictional character who exclusively appears in the Gossip Girl television adaptation, portrayed by Kaylee DeFer. She first appears in`` The Kids Stay in the Picture,'' initially appearing as Serena's estranged cousin, Charlie Rhodes, whom Serena takes under her wing and introduces to the Upper East Side. The fourth season finale ``The Wrong Goodbye, ''reveals her true identity as Ivy Dickens, a struggling actress and con artist hired by Carol Rhodes to pose as her daughter in order to gain access to the real Charlie Rhodes' trust fund.
Document 3: Department store: The iconic department stores of New Zealand's three major centres are Smith & Caughey's (founded 1880), in New Zealand's most populous city, Auckland; Kirkcaldie & Stains (founded 1863) in the capital, Wellington; and Ballantynes (founded 1854) in New Zealand's second biggest city, Christchurch. These offer high-end and luxury items. Additionally, Arthur Barnett (1903) operates in Dunedin. H & J Smith is a small chain operating throughout Southland with a large flagship store in Invercargill. Farmers is a mid-range national chain of stores (originally a mail-order firm known as Laidlaw Leeds founded in 1909). Historical department stores include DIC. Discount chains include The Warehouse, Kmart Australia, and the now-defunct DEKA.
Document 4: Kensington Roof Gardens: The building housed the department store Derry and Toms until 1973, and then Biba until 1975. Since the 1980s the garden has been used as a restaurant and club.
Document 5: Newman Ivey White: Newman Ivey White (1892–1948) was a professor of English at Duke University. He was born February 3, 1892 in Statesville, North Carolina. He was a noted Shelley scholar, as well as a collector of American folklore, including folk songs and Duke limericks. He served as Professor of English at Trinity College and Duke University from 1919 to 1948.** A professorship at Duke has been named in his honor.
Document 6: Department store: All the major British cities had flourishing department stores by the mid-or late nineteenth century. Increasingly, women became the major shoppers and middle-class households. Kendals (formerly Kendal Milne & Faulkner) in Manchester lays claim to being one of the first department stores and is still known to many of its customers as Kendal's, despite its 2005 name change to House of Fraser. The Manchester institution dates back to 1836 but had been trading as Watts Bazaar since 1796. At its zenith the store had buildings on both sides of Deansgate linked by a subterranean passage "Kendals Arcade" and an art nouveau tiled food hall. The store was especially known for its emphasis on quality and style over low prices giving it the nickname "the Harrods of the North", although this was due in part to Harrods acquiring the store in 1919. Other large Manchester stores included Paulden's (currently Debenhams) and Lewis's (now a Primark).
Document 7: Department store: All major cities have their distinctive local department stores, which anchored the downtown shopping district until the arrival of the malls in the 1960s. Washington, for example, after 1887 had Woodward & Lothrop and Garfinckel's starting in 1905. Garfield's went bankrupt in 1990, as did Woodward & Lothrop in 1994. Baltimore had four major department stores: Hutzler's was the prestige leader, followed by Hecht's, Hochschild's and Stewart's. They all operated branches in the suburbs, but all closed in the late twentieth century. By 2015, most locally owned department stores around the country had been consolidated into larger chains, or had closed down entirely.
Document 8: Neues Schauspielhaus: While the auditorium was destroyed in World War II, the facade as well as the cinema survived and in 1951 was renamed the Metropol. Since 1977 it has been used as a discothèque and became a famous music club during the 1980s heyday of West Berlin, frequented by bands like Depeche Mode, Morrissey, The Cross, The Human League and Front 242. For a short time in 2000 it was the location of the KitKatClub and in 2005 the architect Hans Kollhoff remodeled the interior as the "Goya" night club.
Document 9: Ivy Dickens: Ivy Dickens (former alias: Charlotte "Charlie" Rhodes) is a fictional character who exclusively appears in the "Gossip Girl" television adaptation, portrayed by Kaylee DeFer. She first appears in "The Kids Stay in the Picture," initially appearing as Serena's estranged cousin, Charlie Rhodes, whom Serena takes under her wing and introduces to the Upper East Side. The fourth season finale "The Wrong Goodbye," reveals her true identity as Ivy Dickens, a struggling actress and con artist hired by Carol Rhodes to pose as her daughter in order to gain access to the real Charlie Rhodes' trust fund.
Document 10: Ivy Duke: Ivy Duke (9 June 1896, Kensington, London – 8 November 1937, London) was a British actress. She was married to the actor and director Guy Newall with whom she co-starred in several films.
Document 11: Plymouth: In 2004 the old Drake Circus shopping centre and Charles Cross car park were demolished and replaced by the latest Drake Circus Shopping Centre, which opened in October 2006. It received negative feedback before opening when David Mackay said it was already "ten years out of date". In contrast, the Theatre Royal's production and education centre, TR2, which was built on wasteland at Cattedown, was a runner-up for the RIBA Stirling Prize for Architecture in 2003.
Document 12: Ivy Sawyer: The London-born Sawyer danced professionally with John Jarrot until she met and married fellow dancer/actor Joseph Santley. The two would dance and perform on stage together primarily in musical comedies for nearly two decades. They made their Broadway debut together in 1916 in "Betty" at the Globe Theatre and two years later played in the musical comedy "Oh, My Dear!" at the Princess Theatre. The couple appeared in the famous Irving Berlin "Music Box Revues" of the 1920s and later toured the United States, performing at major venues such as the National Theatre in Washington, D.C.
Document 13: Ivy Campany: Ivy Lillian Campany (23 September 1901 – 19 December 2008) was, at age 107, the second from last World War I female army veteran of any country. The last was Florence Green (1901–2012), who was not identified as a veteran of the conflict until January 2010. This meant that Campany was believed to be the conflict's last surviving female veteran by the time of her death in December 2008.
Document 14: Dorothy Phillips: Dorothy Phillips was married to actor-director Allen Holubar for 11 years until his death in 1923 from pneumonia, following surgery, at the age of 33. They met when she was starring on stage in the Chicago production of ""Every Woman"" as the character of Modesty. Phillips also died of pneumonia, in 1980, at the age of 90. She is buried with her husband at the Secret Garden section of Hollywood Forever Cemetery in Los Angeles.
Document 15: Department store: The middle up segment is mainly occupied by Metro Department Store originated from Singapore and Sogo from Japan. 2007 saw the re-opening of Jakarta's Seibu, poised to be the largest and second most upscale department store in Indonesia after Harvey Nichols, which the latter closed in 2010 and yet plans to return. Other international department stores include Debenhams and Marks & Spencer. Galeries Lafayette also joins the Indonesian market in 2013 inside Pacific Place Mall. This department store is targeting middle up market with price range from affordable to luxury, poised to be the largest upscale department store. Galeries Lafayette, Debenhams, Harvey Nichols, Marks & Spencer, Seibu and Sogo are all operated by PT. Mitra Adiperkasa.
ground_truth: 1980s
sub_queries: Ivy Duke >> place of birth Answer: Kensington
when did the roof gardens above Kensington open to the public Answer: 1980s