Question: When did the roof gardens above the city where William Whiting 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: Daniel Webster Whittle: Major Daniel Webster Whittle (November 22, 1840, Chicopee Falls, Massachusetts - March 4, 1901, Northfield, Massachusetts) was a 19th - century American gospel song lyricist, evangelist, and Bible teacher.
Document 3: William de St Croix: William de St Croix was educated at Eton and St John's College, Cambridge, graduating in 1843. He was then ordained and became the Vicar of Glynde from 1844 until his death in 1877. He was the author of several sermons and archaeological papers.
Document 4: 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 5: 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 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: T. H. Parry-Williams: Parry-Williams was born at the Schoolhouse (Welsh:"Tŷ'r Ysgol") in Rhyd Ddu, Caernarfonshire, Wales. He was educated at the University College of Wales, Aberystwyth, Jesus College, Oxford, the University of Freiburg and the Sorbonne. As a poet, he was the first to win the double of Chair and Crown at the National Eisteddfod of Wales, which he achieved at Wrexham in 1912 and repeated at Bangor in 1915. He was a conscientious objector in the First World War. He was Professor of Welsh at the University of Wales, Aberystwyth, from 1920 until 1952. He co-founded the university's Centre for Advanced Welsh and Celtic Studies. He was awarded D.Litt. degrees by the Universities of Wales (1934) and Oxford (1937). He was knighted in 1958. He was also given an honorary doctorate by the University of Wales in 1960 and made an Honorary Fellow of Jesus College, Oxford in 1968.
Document 8: 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 9: 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 10: Nathaniel Williams: Nathaniel Williams was the son of Thomas Williams, from Swansea in South Wales. He studied at the University of Oxford, matriculating as a member of Jesus College in 1672 and obtaining a Bachelor of Arts degree in 1676. He wrote two books: "A Pindaric Elegy on the famous Physician Dr. Willis" (published in 1675) and "Imago Saeculi or the Image of the Age represented in four Characters, viz. the ambitious Statesman, insatiable Miser, atheistic Gallant, and factious Schismatic" (published the following year). He died in about 1679.
Document 11: 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 12: Winchester: There was a fire in the city in 1141 during the Rout of Winchester. William of Wykeham played a role in the city's restoration. As Bishop of Winchester he was responsible for much of the current structure of the cathedral, and he founded the still extant public school Winchester College. During the Middle Ages, the city was an important centre of the wool trade, before going into a slow decline. The curfew bell in the bell tower (near the clock in the picture), still sounds at 8:00 pm each evening.
Document 13: Charles Wesley: Charles Wesley was the eighteenth child of Susanna Wesley and Samuel Wesley. He was born in Epworth, Lincolnshire, England, where his father was rector. He was educated at Westminster School and Christ Church, Oxford, where he was ordained. At Oxford, Charles formed a prayer group among his fellow students in 1727; his elder brother, John, joined in 1729, soon becoming its leader and moulding it in line with his own convictions. They focused on studying the Bible and living a holy life. Other students mocked them, saying they were the "Holy Club", "Sacramentarians", and "the Methodists", being methodical and exceptionally detailed in their Bible study, opinions and disciplined lifestyle. George Whitefield joined the group. After graduating with a master's degree in classical languages and literature, Charles followed his father and brother into Anglican orders in 1735.
Document 14: William Whiting (poet): He was born in Kensington, England, and educated at Chapham and Winchester College. Because of his musical ability, he became master of Winchester College Choristers' School. While best known for "Eternal Father, Strong to Save", Whiting also published two poetry collections: "Rural Thoughts" (1851) and "Edgar Thorpe, or the Warfare of Life" (1867). He died at Winchester.
Document 15: Jacob French: Jacob French (July 15, 1754 – May 1817) was a singing master and one of the first American composers. "A student of William Billings, French adopted Billings' innovative approach to psalmody ... His music tends to be more complex in its structure, rhythm, and counterpoint than most of his contemporaries." "Along with William Billings, he is regarded as one of the finest composer of anthems in the New England tradition." French's "Farewell Anthem" appears in "Southern Harmony", 1835, as well as "The Sacred Harp" from 1844 to the present. He was born in Stoughton, Massachusetts. His brother, Edward, also composed a few tunes
ground_truth: 1980s
sub_queries: William Whiting >> place of birth Answer: Kensington
when did the roof gardens above Kensington open to the public Answer: 1980s