Question: When was founded the company that acquired Plummer Roddis?

Context articles: Truevision
Magee Marshall &amp; Co
G. K. Hall &amp; Co.
AdMob
List of Codemasters video games
Plummer Roddis
Debenhams
List of mergers and acquisitions by Symantec
James Henry Plummer
Norlandair

Truevision, Inc. was a maker of digital video processing add-on boards for PC computers.
 It was founded by Cathleen Asch, Carl Calabria, Joseph Haaf, Bryan Hunt, Brad Pillow, Joe Shepard and Jeff Walters and others when AT&T split off their Electronic Photography and Imaging Center (EPICenter) in 1987.
 EPICenter was founded by Alan Wlasuk, Carl Calabria, Bryan Hunt, Brad Pillow, Joe Shepard and Jeff Walters.
 Located in Indianapolis, Indiana, Truevision was later acquired by monitor and graphics card maker RasterOps in Santa Clara, California.
 RasterOps took on the Truevision name and retained the Indianapolis engineering team which continued producing ever more advanced products until 1999 when the company was finally acquired by its biggest competitor, Pinnacle Systems.
 Pinnacle Systems was later acquired by Avid Technology, who initially used the AT-Vista when they were a two-person startup company.
Magee Marshall & Company was a brewery that operated from the Crown Brewery in Bolton, Lancashire, England.
 It was founded by David Magee, a brewer and spirit merchant, in 1853.
 He moved from the Good Samaritan Brewhouse to the Crown Hotel in the 1860s and built the Crown Brewery in Derby Street next to the hotel.
 After his death, he was succeeded by his sons, who acquired David Marshall's Grapes Brewery and the Horseshoe Brewery.
 The company was registered as Magee Marshall & Company Ltd. in 1888.
 The company acquired Henry Robinson's Brewery in Wigan and Halliwell's Alexandra Brewery.
 In 1959, it was acquired by Greenall Whitley & Company and closed in 1970.
G. K. Hall & Co. is an American book publisher based in Boston.
 It was founded sometime in the late 1950s by Garrison Kent Hall (1917–1973), who also had been an accountant.
 The firm initially, in the late 1950s through the 1960s, produced catalogs, in print and microform, of collections of renowned libraries — notably the New York Public Library.
 In the 1960s, the firm expanded, producing other library references in the sciences, humanities, fine arts, and music.
 Beginning in 1971, two years after being acquired by ITT, the firm became a leading pioneer of publishing large-print editions of best-selling fiction and non-fiction books.
 In 1972 it acquired Gregg Press the scholarly reprint company.
 In 1973 it acquired Twayne Publishers.
 In 1989 it acquired Sandak, the art slide publisher.
 In 1990 it acquired Thorndike Press, its main American large print competitor.
AdMob is a mobile advertising company founded by Omar Hamoui.
 The name AdMob is a portmanteau for "advertising on mobile".
 It was incorporated on April 10, 2006 while Hamoui was in business school at Wharton.
 The company is based in Mountain View, California.
 In November 2009 it was acquired by Google for $750 million.
 The acquisition was completed on May 27, 2010.
 Apple Inc. had also expressed interest in purchasing the company the same year, but they were out-bid by Google.
 Prior to being acquired by Google, AdMob acquired the company AdWhirl, formerly Adrollo, which is a platform for developing advertisements in iPhone applications.
 AdMob offers advertising solutions for many mobile platforms, including Android, iOS, webOS, Flash Lite, Windows Phone and all standard mobile web browsers.
Codemasters is a British video game developer and publisher founded by David Darling and his brother Richard in 1986.
 The headquarter of the studio is set in Southam, Warwickshire, while the company another 3 subsidiaries are set in Birmingham and Kuala Lumpur, Malaysia.
 The company was known for developing and publishing racing titles such as "Colin McRae Rally", "Micro Machines" and "TOCA".
 The company also released several other games in other genres, such as the action-adventure series "Overlord", the tactical shooter series "Operation Flashpoint" and the "Brian Lara Cricket" series.
 In 2008, the company acquired the rights to develop and publish licensed "Formula One" video games.
 In the same year, the company acquired Sega Studio from Sega and Codemasters Birmingham from Swordfish Studios.
 The company's majority owner is Reliance Big Entertainment, which acquired a 50% stake in the company in 2010 and increase to 60.41% in 2013.
Plummer Roddis was a chain of department store based in the South of England which was acquired by Debenhams.
Debenhams plc is a British multinational retailer operating under a department store format in the United Kingdom and Ireland with franchise stores in other countries.
 The company was founded in the eighteenth century as a single store in London and has now grown to 178 locations across the UK, Ireland and Denmark.
 It sells a range of clothing, household items and furniture and has been known since 1993 for its 'Designers at Debenhams' brand range.
Symantec is an American computer software company founded on March 1, 1982.
 It is an international corporation that specializes in selling security and information management software, and is listed on the NASDAQ-100 stock market index and Fortune 1000 list of the largest American companies.
 Gary Hendrix founded the company in 1982 with the help of a National Science Foundation grant.
 Symantec was originally focused on artificial intelligence-related projects, and Hendrix hired several Stanford University natural language processing researchers as the company's first employees.
 After the company's initial public offering in 1989, Hendrix left the company in 1991 and moved to Texas.
 The company has acquired 57 companies, purchased stakes in 2 firms, and divested 26 companies, in which parts of the company are sold to another company.
 Of the companies that Symantec has acquired, 50 were based in the United States.
 Symantec has not released the financial details for most of these mergers and acquisitions.
James Henry Plummer (19 February 1848 – 10 September 1932) was a Canadian financier, He acquired the Dominion Iron and Steel Company in 1903 and developed it as a major industry before and during the First World War.
Norlandair is an Icelandic airline.
 Norlandair was founded on 1 June 2008 when it acquired the Twin Otter flight operation of Air Iceland.
 But the company can trace its roots to a company with the same name, i.e. Norlandair, which was founded in 1974.
 That company was founded by a few aviation professionals that acquired North Air, an aviation company based in Akureyri.
 ln 1975 Icelandair bought a stake in the company and by that Norlandair purchased a Twin Otter aircraft that was used in scheduled flights and charter flights.
 This event also marks the beginning of Norlandair offering aviation services on the east coast of Greenland.