Question: At June 1985's Consumer Electronics Show, on what date did the publisher of Magnetica unveil its new systems?

full_context: Document 1: Nintendo Entertainment System: Several companies, refusing to pay the licensing fee or having been rejected by Nintendo, found ways to circumvent the console's authentication system. Most of these companies created circuits that used a voltage spike to temporarily disable the 10NES chip in the NES. A few unlicensed games released in Europe and Australia came in the form of a dongle that would be connected to a licensed game, in order to use the licensed game's 10NES chip for authentication. In order to combat unlicensed games, Nintendo of America threatened retailers who sold them with losing their supply of licensed titles. In addition, multiple revisions were made to the NES PCBs to prevent these games from working.
Document 2: Yoshi Touch & Go: Yoshi Touch & Go, known in Japan as , is a video game that was developed and published by Nintendo for the Nintendo DS. It debuted in Japan on January 27, 2005, in North America on March 14, 2005, and in Europe on May 6, 2005. As of August 2007, the game sold 197,337 copies in Japan. "Yoshi Touch & Go" was produced by Takashi Tezuka and directed by Hiroyuki Kimura. It was one of the launch titles for the DS in Japan. The game was released on the Wii U Virtual Console in 2015.
Document 3: Magnetica: Magnetica (known in Japan as and in Europe as Actionloop) is a puzzle game for the Nintendo DS, released as part of the Touch! Generations series. The game was developed by Mitchell Corporation and published by Nintendo, and is based on Mitchell's 1998 arcade game "Puzz Loop".
Document 4: Nemrem: Nemrem, known as Zengage in North America and Somnium in Japan, is a puzzle video game developed by Skip Ltd. and published by Nintendo for the Nintendo DSi's DSiWare digital distribution service.
Document 5: Planet Puzzle League: Planet Puzzle League, known as Puzzle League DS in Europe, and as in Japan, is a video game for the Nintendo DS handheld video game console in the "Puzzle League"/"Panel de Pon" visual matching puzzle game series. In North America, "Planet Puzzle League" is part of the "Touch! Generations" brand; in Japan, "Panel de Pon DS" is marketed in the general "Touch!" brand. The publisher for the game is Nintendo, and the developer is Nintendo second-party developer Intelligent Systems, creator of the original "Panel de Pon" and its cult classic English-language adaptation "Tetris Attack". The game was released in Japan on April 26, 2007 in North America on June 4, 2007, and in Europe on June 29, 2007.
Document 6: Nintendo Entertainment System: For its complete North American release, the Nintendo Entertainment System was progressively released over the ensuing years in four different bundles: the Deluxe Set, the Control Deck, the Action Set and the Power Set. The Deluxe Set, retailing at US$199.99 (equivalent to $475 in 2016), included R.O.B., a light gun called the NES Zapper, two controllers, and two Game Paks: Gyromite, and Duck Hunt. The Basic Set, retailing at US$89.99 with no game, and US$99.99 bundled with "Super Mario Bros." The Action Set, retailing in 1988 for US$149.99, came with the Control Deck, two game controllers, an NES Zapper, and a dual Game Pak containing both Super Mario Bros. and Duck Hunt. In 1989, the Power Set included the console, two game controllers, a NES Zapper, a Power Pad, and a triple Game Pak containing Super Mario Bros, Duck Hunt, and World Class Track Meet. In 1990, a Sports Set bundle was released, including the console, an NES Satellite infrared wireless multitap adapter, four game controllers, and a dual Game Pak containing Super Spike V'Ball and Nintendo World Cup. Two more bundle packages were later released using the original model NES console. The Challenge Set of 1992 included the console, two controllers, and a Super Mario Bros. 3 Game Pak for a retail price of US$89.99. The Basic Set, first released in 1987, was repackaged for a retail US$89.99. It included only the console and two controllers, and no longer was bundled with a cartridge. Instead, it contained a book called the Official Nintendo Player's Guide, which contained detailed information for every NES game made up to that point.
Document 7: Nintendo Entertainment System: Video output connections varied from one model of the console to the next. The original HVC-001 model of the Family Computer featured only radio frequency (RF) modulator output. When the console was released in North America and Europe, support for composite video through RCA connectors was added in addition to the RF modulator. The HVC-101 model of the Famicom dropped the RF modulator entirely and adopted composite video output via a proprietary 12-pin "multi-out" connector first introduced for the Super Famicom/Super Nintendo Entertainment System. Conversely, the North American re-released NES-101 model most closely resembled the original HVC-001 model Famicom, in that it featured RF modulator output only. Finally, the PlayChoice-10 utilized an inverted RGB video output.
Document 8: List of Super Nintendo Entertainment System games: Of the console's 783 official releases, 249 were exclusive to North America and 62 to Europe. The Super NES was released in North America on August 23, 1991 with its launch titles being Super Mario World, F - Zero, Pilotwings, SimCity, and Gradius III. The last game to be officially published for the system was Frogger in 1998. The best - selling game is Super Mario World with over 20.6 million units sold. Despite the console's relatively late start, and the fierce competition it faced in North America and Europe from Sega's Genesis / Mega Drive console, it was the best - selling console of its era.
Document 9: Nintendo Entertainment System: The Nintendo Entertainment System (commonly abbreviated as NES) is an 8 - bit home video game console that was developed and manufactured by Nintendo. It was initially released in Japan as the Family Computer (Japanese: ファミリーコンピュータ, Hepburn: Famirī Konpyūta) (also known by the portmanteau abbreviation Famicom (ファミコン, Famikon) and abbreviated as FC) on July 15, 1983, and was later released in North America during 1985, in Europe during 1986 and 1987, and Australia in 1987. In South Korea, it was known as the Hyundai Comboy (현대컴보이 Hyeondae Keomboi) and was distributed by SK Hynix which then was known as Hyundai Electronics. The best - selling gaming console of its time, the NES helped revitalize the US video game industry following the video game crash of 1983. With the NES, Nintendo introduced a now - standard business model of licensing third - party developers, authorizing them to produce and distribute titles for Nintendo's platform. It was succeeded by the Super Nintendo Entertainment System.
Document 10: Nintendo Entertainment System: In the UK, Italy and Australia which share the PAL A region, two versions of the NES were released; the "Mattel Version" and "NES Version". When the NES was first released in those countries, it was distributed by Mattel and Nintendo decided to use a lockout chip specific to those countries, different from the chip used in other European countries. When Nintendo took over European distribution in 1990, they produced consoles that were then labelled "NES Version"; therefore, the only differences between the two are the text on the front flap and texture on the top/bottom of the casing.
Document 11: Nintendo Entertainment System: As the 1990s dawned, gamers predicted that competition from technologically superior systems such as the 16-bit Sega Mega Drive/Genesis would mean the immediate end of the NES’s dominance. Instead, during the first year of Nintendo's successor console the Super Famicom (named Super Nintendo Entertainment System outside Japan), the Famicom remained the second highest-selling video game console in Japan, outselling the newer and more powerful NEC PC Engine and Sega Mega Drive by a wide margin. The console remained popular in Japan and North America until late 1993, when the demand for new NES software abruptly plummeted. The final Famicom game released in Japan is Takahashi Meijin no Bōken Jima IV (Adventure Island IV), while in North America, Wario's Woods is the final licensed game. In the wake of ever decreasing sales and the lack of new software titles, Nintendo of America officially discontinued the NES by 1995. However, Nintendo kept producing new Famicom units in Japan until September 25, 2003, and continued to repair Famicom consoles until October 31, 2007, attributing the discontinuation of support to insufficient supplies of parts.
Document 12: Mighty Flip Champs!: Mighty Flip Champs! is a puzzle platform video game, developed and published by WayForward Technologies for the Nintendo DSi's DSiWare digital download service. It was first announced on March 9, 2009, and was released on June 1, 2009 in North America and on November 27, 2009 in the PAL regions. The developers took inspiration from multiple sources, including the video games "Wendy: Every Witch Way" and "". In it, players control Alta, a girl who has to reach a fishman by flipping between areas until she can reach him. Since its release, "Mighty Flip Champs!" has received all-around positive reception. It holds an aggregate score of 83/100 and 83.50% from Metacritic and GameRankings respectively, while also being called one of the best video games for the DSiWare service. It is the first game in the "Mighty" series, and is followed by "Mighty Milky Way", "Mighty Switch Force!", and "Mighty Switch Force! 2".
Document 13: Mole Mania: Mole Mania, known in Japan as , is a 1996 video game developed by Nintendo EAD and Pax Softnica, and published by Nintendo for the original Game Boy. It is also one of the least known works of Shigeru Miyamoto. The game was re-released for the Nintendo 3DS Virtual Console in all major regions throughout 2012.
Document 14: The New Tetris: The New Tetris is a puzzle video game for the Nintendo 64. The game was developed by H2O Entertainment and published by Nintendo, based on the latter's popular "Tetris" series. The game was originally released on July 31, 1999, in North America.
Document 15: Nintendo Entertainment System: At June 1985's Consumer Electronics Show (CES), Nintendo unveiled the American version of its Famicom. This is the system which would eventually be officially deployed as the Nintendo Entertainment System, or the colloquial "NES". Nintendo seeded these first systems to limited American test markets starting in New York City on October 18, 1985, following up with a full-fledged North American release of the console in February of the following year. Nintendo released 17 launch titles: 10-Yard Fight, Baseball, Clu Clu Land, Duck Hunt, Excitebike, Golf, Gyromite, Hogan’s Alley, Ice Climber, Kung Fu, Pinball, Soccer, Stack-Up, Tennis, Wild Gunman, Wrecking Crew, and Super Mario Bros.h[›] Some varieties of these launch games contained Famicom chips with an adapter inside the cartridge so they would play on North American consoles, which is why the title screen of Gyromite has the Famicom title "Robot Gyro" and the title screen of Stack-Up has the Famicom title "Robot Block".
ground_truth: October 18, 1985
sub_queries: Who published Magnetica? Answer: Nintendo
What day did Nintendo unveil the new systems? Answer: October 18, 1985