question: White Dwarf is a publication that advertises which producer of Warhammer 40,000 game products?
answer: Citadel Miniatures
context: Title: Warhammer 40,000
  Passage: Warhammer 40,000 (informally known as Warhammer 40K, WH40K or simply 40K) is a tabletop miniature wargame produced by Games Workshop, set in a dystopian science fantasy universe.  "Warhammer 40,000" was created by Rick Priestley in 1987 as the futuristic companion to "Warhammer Fantasy Battle", sharing many game mechanics.  Expansions for "Warhammer 40,000" are released periodically which give rules for urban, planetary siege and large-scale combat.  The game is in its eighth edition, which was released on June 17, 2017.
  Title: Matt Ward (game designer)
  Passage: Matt Ward is a British author and miniature wargaming designer, who is best known for his work with Games Workshop on the Warhammer Fantasy Battles, Warhammer 40,000 and The Lord of the Rings Strategy Battle Game systems.  He was also a frequent contributor to the magazine White Dwarf during his time at the company.
  Title: Warhammer 40,000: Chaos Gate
  Passage: Warhammer 40,000: Chaos Gate is a video game set in the gothic science fiction backdrop of the Games Workshop game system "Warhammer 40,000".  In it, players take command of a number of squads of Ultramarines under the leadership of Captain Kruger.  They are pitted against the armies of the Chaos Lord Zymran, who commands the traitor marines of the Word Bearers and their daemonic allies.  In the Warhammer 40,000 background, the Ultramarines and Word Bearers are ancient enemies from when they fought during the Horus Heresy.
  Title: White Dwarf (magazine)
  Passage: White Dwarf is a magazine published by British games manufacturer Games Workshop, which has long served as a promotions and advertising platform for Games Workshop and Citadel Miniatures products.
  Title: Citadel Miniatures
  Passage: Citadel Miniatures Limited is a company which produces metal, resin and plastic miniature figures for tabletop wargames such as "Warhammer Fantasy Battle" and "Warhammer 40,000".
  Title: Warhammer 40,000 Apocalypse
  Passage: Warhammer 40,000 Apocalypse is an expansion to the Warhammer 40,000 tabletop miniatures wargame by the British gaming company Games Workshop.  It contains rules which allow players to field massive armies the likes of which are unwieldy using the basic Warhammer 40,000 ruleset.  It also allows players to field units that are not available in normal Warhammer 40,000 games, such as large super-heavy tanks and robot-like titans, some of which are almost a foot tall.
  Title: Warhammer 40,000: Storm of Vengeance
  Passage: Warhammer 40,000: Storm of Vengeance is a real-time strategy video game developed and published by Eutechnyx.  It was released for Microsoft Windows, Android and iOS.  "Warhammer 40,000: Storm of Vengeance" was set in the "Warhammer 40,000" universe, it follows the Dark Angels, commanded by Grand Master Belial, and the Bad Moons, commanded by Ork Warlord Ghazghkull Thraka on the planet Piscina IV.  "Warhammer 40,000: Storm of Vengeance" was released on; 3 April 2014 (Steam), 23 April 2014 (Google Play) and 1 May 2014 (iOS).
  Title: White dwarf
  Passage: A white dwarf, also called a degenerate dwarf, is a stellar core remnant composed mostly of electron-degenerate matter.  A white dwarf is very dense: its mass is comparable to that of the Sun, while its volume is comparable to that of Earth.  A white dwarf's faint luminosity comes from the emission of stored thermal energy; no fusion takes place in a white dwarf wherein mass is converted to energy.  The nearest known white dwarf is Sirius B, at 8.6 light years, the smaller component of the Sirius binary star.  There are currently thought to be eight white dwarfs among the hundred star systems nearest the Sun.  The unusual faintness of white dwarfs was first recognized in 1910.  The name "white dwarf" was coined by Willem Luyten in 1922.
  Title: John Blanche
  Passage: John Blanche is a British fantasy and science fiction illustrator and modeler known for his work for Games Workshop's White Dwarf magazine, Warhammer Fantasy Battle, Warhammer Fantasy Roleplay and Warhammer 40,000 games and his role as art director for the company, including his work in the field of fantasy miniature painting, and for illustrations for various game book and Fighting Fantasy publications.
  Title: Epic (game)
  Passage: Epic is a tabletop wargame set in the fictional "Warhammer 40,000" universe.  Whereas "Warhammer 40,000" involves small battles between forces of a few squads of troops and two or three vehicles, Epic features battles between armies consisting of dozens of tanks and hundreds of soldiers.  Due to the comparatively larger size of the battles, "Epic" miniatures are smaller than those in "Warhammer 40,000", with a typical human being represented with a high figure, as opposed to the 28mm minis used in "Warhammer 40,000".
citations: Citadel Miniatures White Dwarf (magazine)