Given the question: Information: - Ealing Studios is a television and film production company and facilities provider at Ealing Green in west London. Will Barker bought the White Lodge on Ealing Green in 1902 as a base for film making, and films have been made on the site ever since. It is the oldest continuously working studio facility for film production in the world, and the current stages were opened for the use of sound in 1931. It is best known for a series of classic films produced in the post-WWII years, including "Kind Hearts and Coronets" (1949), "Passport to Pimlico" (1949), "The Lavender Hill Mob" (1951), and "The Ladykillers" (1955). The BBC owned and filmed at the Studios for forty years from 1955 until 1995. Since 2000, Ealing Studios has resumed releasing films under its own name, including the revived "St Trinian's" franchise. In more recent times, films shot here include "The Importance of Being Earnest" (2002) and "Shaun of the Dead" (2004), as well as "The Theory of Everything" (2014), "The Imitation Game" (2014) and "Burnt" (2015). Interior scenes of the British period drama television series "Downton Abbey" are shot in Stage 2 of the studios. The Met Film School London operates on the site. - Roland Pertwee (17 May 1885 26 April 1963) was an English playwright, film and television screenwriter, director and actor. He was the father of "Doctor Who" actor Jon Pertwee and fellow playwright and screenwriter Michael Pertwee. He was also the second cousin of actor Bill Pertwee and grandfather of actors Sean Pertwee and Dariel Pertwee. - David Mervyn Johns (18 February 18996 September 1992) was a distinctive Welsh film and television character actor who became a star of British films during World War II. Continuing into the postwar era, he was a notable mainstay of Ealing Studios. - Worcestershire (or ; written abbreviation: Worcs) is a county in the West Midlands of England. Between 1974 and 1998, it was merged with the neighbouring county of Herefordshire as Hereford and Worcester. - Doctor Who is a British science-fiction television programme produced by the BBC since 1963. The programme depicts the adventures of a Time Lord called "The Doctor", an extraterrestrial being from the planet Gallifrey. He explores the universe in a time-travelling space ship called the TARDIS. Its exterior appears as a blue British police box, which was a common sight in Britain in 1963 when the series first aired. Accompanied by a number of companions, the Doctor combats a variety of foes, while working to save civilisations and help people in need. - London is the capital and most populous city of England and the United Kingdom, as well as the most populous city proper in the European Union. Standing on the River Thames in the south east of the island of Great Britain, London has been a major settlement for two millennia. It was founded by the Romans, who named it "Londinium". London's ancient core, the City of London, largely retains its medieval boundaries. Since at least the 19th century, "London" has also referred to the metropolis around this core, historically split between Middlesex, Essex, Surrey, Kent, and Hertfordshire, which today largely makes up Greater London, governed by the Mayor of London and the London Assembly. - Pink String and Sealing Wax is a 1945 British drama film directed by Robert Hamer and starring Mervyn Johns , Googie Withers and Gordon Jackson . It is based on a play with the same name by Roland Pertwee . It was the first feature film Robert Hamer directed on his own . - A film, also called a movie, motion picture, theatrical film or photoplay, is a series of still images which, when shown on a screen, creates the illusion of moving images due to the phi phenomenon. This optical illusion causes the audience to perceive continuous motion between separate objects viewed rapidly in succession. The process of filmmaking is both an art and an industry. A film is created by photographing actual scenes with a motion picture camera; by photographing drawings or miniature models using traditional animation techniques; by means of CGI and computer animation; or by a combination of some or all of these techniques and other visual effects. - Robert James Hamer (31 March 1911, Kidderminster, Worcestershire 4 December 1963, London) was a British film director and screenwriter. - Sean Pertwee (born 4 June 1964) is an English actor and voice actor. Pertwee attended Teddington School and Sunbury College. Pertwee has played Captain Fitzpatrick in the play "Tom Jones", Sergeant Wells in "Dog Soldiers", Pilot Smith in "Event Horizon", Inspector Lestrade in CBS's "Elementary" and Alfred Pennyworth in Fox's "Gotham". He is also the narrator of "". Given the paragraphs above, decide what entity has the relation 'production company' with 'ealing studios'.
The answer is:
pink string and sealing wax