Question: When did the roof gardens above Damaris Hayman's birthplace open to the public?

full_context: Document 1: 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.
Document 2: 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 3: Josephine Barnes: She was born on 18 August 1912 and she was the eldest of five. She was born at Cliff Road, Sheringham, Norfolk and educated at Oxford High School in North Oxford and the University of Oxford, reading Natural Sciences at Lady Margaret Hall. She then studied medicine at University College London.
Document 4: 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 5: Michelle Magorian: Michelle Magorian was born in Portsmouth, Hampshire, and is of Armenian origin. She lived in Singapore and Australia from age seven to nine. As a child she spent as much time as possible in the King's Theatre in Portsmouth and her ambition was to become an actress. After three years of study at the Rose Bruford College of Speech and Drama, she spent two years at Marcel Marceau's L'école Internationale de Mime in Paris. From there she launched into a professional acting career and spent a few years touring all over the country - from Scotland to Devon and then Yorkshire - working in repertory companies, taking any part she could. Michelle's worst stage part was playing Orinoco in "The Wombles" musical. All this time she had been secretly writing stories. When she was 24 she became interested in children's books, and decided to write one herself.
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: Damaris Hayman: Hayman was born in Kensington, London, England and educated at Cheltenham Ladies' College. After repertory work in the theatre, she made her film début in "The Belles of St Trinian's" (1954) in an uncredited role as a sixth former.
Document 8: John Abineri: Born in London, he attended the Old Vic drama school and described himself as "Well educated from the age of five to eighteen". He spoke a number of languages (including German, Russian and French) fluently, which led to him being cast as a number of different nationalities.
Document 9: 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 10: Shamim Hilaly: Shameem Hilaly is a Pakistani actress.She completed her formal education from Convent of Jesus and Mary & Kinnaird College For Women in Lahore. She is noted for her performance in “Maigh Malhaar” during the 1990s. She has also acted in Pakistan's only English language movie, "Beyond the Last Mountain" (1976). Hilaly's career started from the drama, Alif Noon.
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: Clare Francis: Francis was born in Thames Ditton in Surrey and spent summer holidays on the Isle of Wight, where she learnt to sail. She was educated at the Royal Ballet School, then gained a degree in Economics at University College London.
Document 13: Katherine Weare: She was educated at the Grey Coat Hospital, Westminster, the University of Kent at Canterbury, Goldsmiths College, University of London and the Institute of Education, University of London. She began her career as a teacher of English and Drama in secondary schools, and moved into higher education at the age of 25. She has researched and written extensively on mental health, emotional wellbeing, emotional and social learning.
Document 14: Harriet Spicer: She lived in Chelsea prior to attending Lillsden School for Girls and then Benenden School. In 1968 she spent some time working for Richard Branson's "Student" magazine. She went on to graduate from St Anne's College, Oxford University.
Document 15: 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.
ground_truth: 1980s
sub_queries: Damaris Hayman >> place of birth Answer: Kensington
when did the roof gardens above Kensington open to the public Answer: 1980s