Question: What film in the HTTYD franchise was written and directed by Dean DeBlois?

Context paragraphs:
Dean DeBlois: Dean DeBlois ( ; born June 7, 1970) is a Canadian film director, film producer, screenwriter, animator and editor.  He is best known for co-writing and co-directing the Oscar-nominated animated films "Lilo & Stitch" for Walt Disney Feature Animation, "How to Train Your Dragon" and its sequel for DreamWorks Animation, and directed the "Sigur Rós" documentary/music film "Heima".

How to Train Your Dragon (film): How to Train Your Dragon is a 2010 American 3D computer-animated action-fantasy film produced by DreamWorks Animation and distributed by Paramount Pictures.  Loosely based on the British book series of the same name by Cressida Cowell, the film was directed by Chris Sanders and Dean DeBlois, the duo who directed Disney's "Lilo & Stitch".  It stars the voices of Jay Baruchel, Gerard Butler, Craig Ferguson, America Ferrera, Jonah Hill, T.J. Miller, Kristen Wiig, and Christopher Mintz-Plasse.

Lilo &amp; Stitch (franchise): Lilo & Stitch is an American Disney media franchise that commenced in 2002 with the release of the animated film of the same name written and directed by Dean DeBlois and Chris Sanders.  The combined critical and commercial success of the original film, which was a rarity for the company's feature animation studio during the early 2000s, led to three direct-to-video and television seq films, a short film, three television series, several video games, some theme park attractions, and various merchandise.

Stargate: Stargate is a military science fiction and media franchise based on the film written by Dean Devlin and Roland Emmerich.  The franchise is based on the idea of an alien Einstein–Rosen bridge device (the Stargate) that enables nearly instantaneous travel across the cosmos.  The franchise began with the film "Stargate", released on October 28, 1994, by Metro-Goldwyn-Mayer and Carolco, which grossed US$197 million worldwide.  In 1997, Brad Wright and Jonathan Glassner created a television series titled "Stargate SG-1" as a sequel to the film.  This show was joined by "Stargate Atlantis" in 2004, "Stargate Universe" in 2009, and a prequel web series, "Stargate: Origins", in 2017.  Also consistent with the same story are a variety of books, video games and comic books, as well as the direct-to-DVD movies "" and "", which concluded the first television show after 10 seasons.

Lilo &amp; Stitch: Lilo & Stitch is a 2002 American animated science fiction comedy-drama film produced by Walt Disney Feature Animation and released by Walt Disney Pictures.  The 42nd Disney animated feature film, "Lilo & Stitch" was written and directed by Dean DeBlois and Chris Sanders, the latter also starring as Stitch, and features the voices of Daveigh Chase, Tia Carrere, David Ogden Stiers, Kevin McDonald, Ving Rhames, Jason Scott Lee, and Kevin Michael Richardson.  It was the second of three Disney animated features produced primarily at the Florida animation studio located at Disney's Hollywood Studios (then known as Disney-MGM Studios during production) in Walt Disney World near Orlando, Florida.

How to Train Your Dragon (franchise): How to Train Your Dragon franchise (also referred to as simply HTTYD) from DreamWorks Animation consists of two feature films "How to Train Your Dragon" (2010) and "How to Train Your Dragon 2" (2014), with a third and final planned for a 2019 release.  The franchise is loosely based on the British book series by Cressida Cowell.  The franchise also consists of four short films: "Legend of the Boneknapper Dragon" (2010), "Book of Dragons" (2011), "Gift of the Night Fury" (2011) and "Dawn of the Dragon Racers" (2014).  A television series following the events of the first film, "", began airing on Cartoon Network in September 2012.  Its second season was renamed "Dragons: Defenders of Berk".  Set several years later, and as a more immediate prequel to the second film, a new television series, titled "Dragons: Race to the Edge", aired on Netflix in June 2015.  The second season of the show was added to Netflix in January 2016 and a third season in June 2016.  A fourth season aired on Netflix in February 2017 and a fifth season in August 2017.

Go Quiet: Go Quiet is a music film directed by Dean DeBlois, featuring acoustic renditions of all nine songs from the 2010 album "Go" by Jón Þór (Jónsi) Birgisson.  The film was created as a counterpart to the lavishly produced studio tracks of "Go", with an emphasis on stripped-down intimacy.  Go Quiet was filmed in Reykjavík during New Year, 2010, and features the festive sights and sounds of New Year's Eve in Iceland.  Dean DeBlois, who also directed 2007's "Heima" for Sigur Rós, had this to say of the film's intent: "The concept behind ‘Go Quiet’ was simple: it’s New Year’s Day in Reykjavík, and Jónsi awakens to a trashed house in the wake of his party.  He avoids cleaning up and instead procrastinates by playing songs that reflect the night before, the bittersweetness of new year, and the melancholy of a year gone by".

Out of Control (2002 film): Out of Control is a 2002 British television film written and directed for BBC by Dominic Savage.  It stars Tamzin Outhwaite as Shelley Richards, an impoverished single mother whose son, Dean (Danny Young), is involved in a string of crimes that lead to his incarceration in a young offenders institute (YOI).  David Morrissey plays prison warden Mike, who tries to keep Dean out of trouble but has difficultly watching him all the time.  After continuous bullying at the YOI, Dean is no longer able to cope and makes a fatal decision.  It is the third in a loose trilogy of films by Savage about social deprivation, following "Nice Girl" (2000) and "When I Was Twelve" (2001).

How to Train Your Dragon 2: How to Train Your Dragon 2 is a 2014 American 3D computer-animated fantasy action film produced by DreamWorks Animation and distributed by 20th Century Fox, loosely based on the British book series of the same name by Cressida Cowell.  It is the sequel to the 2010 computer-animated film "How to Train Your Dragon" and the second in the trilogy.  The film is written and directed by Dean DeBlois, and stars the voices of Jay Baruchel, Gerard Butler, Craig Ferguson, America Ferrera, Jonah Hill, Christopher Mintz-Plasse, T.J. Miller, and Kristen Wiig, with the addition of Cate Blanchett, Djimon Hounsou, and Kit Harington.  The film takes place five years after the first film, featuring Hiccup and his friends as young adults as they meet Valka, Hiccup's long-lost mother, and Drago Bludvist, a madman who wants to conquer the world.

Chris Sanders: Christopher Michael "Chris" Sanders (born March 12, 1962) is an American animation director, illustrator and voice actor.  He is best known for co-writing and directing the Disney animated feature film "Lilo & Stitch" (2002) and DreamWorks Animation's "How to Train Your Dragon" (2010), both of which he co-wrote and co-directed with Dean DeBlois, and for creating and voicing Stitch in "Lilo & Stitch" and almost every work in its franchise.  His recent work was serving as director and co-writer on "The Croods", along with Kirk DeMicco.

Supporting paragraphs: How to Train Your Dragon 2 How to Train Your Dragon (franchise)
Answer: How to Train Your Dragon 2