Question: Which of the short films contained in "How to Train Your Dragon" franchise is a 2010 animated short film by DreamWorks Animation?

Context paragraphs:
Paperman: Paperman is a 2012 American black-and-white computer-cel animated romantic comedy short film produced by Walt Disney Animation Studios and directed by John Kahrs.  The short blends traditional animation and computer animation, and won both the Academy Award for Best Animated Short Film at the 85th Academy Awards and the Annie Award for Best Animated Short Subject at the 40th Annie Awards.  "Paperman" was the first animated short film produced by Walt Disney Animation Studios to win an Academy Award since "It's Tough to Be a Bird" in 1970.

Book of Dragons: Book of Dragons is a computer-animated/2D-animated short film based on the "How to Train Your Dragon" franchise.  It was produced by DreamWorks Animation and directed by Steve Hickner.  The short was released on November 15, 2011, on DVD and Blu-ray, along with "Gift of the Night Fury", another short film based on the "Dragons".

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.

Gift of the Night Fury: Gift of the Night Fury is a 2011 computer-animated short film by DreamWorks Animation and directed by Tom Owens.  It was released on November 15, 2011, on DVD and Blu-ray, along with another original animated short film "Book of Dragons".

DreamWorks Animation: DreamWorks Animation SKG, Inc. (more commonly known as DreamWorks Animation, or simply DreamWorks) is an American animation studio that is a subsidiary of Universal Studios, a division of NBCUniversal, itself a division of Comcast.  It is based in Glendale, California and produces animated feature films, television programs and online virtual games.  The studio has currently released a total of 35 feature films, including the franchises "Shrek", "Madagascar", "Kung Fu Panda" and "How to Train Your Dragon".  Originally formed under the banner of its main DreamWorks studio in 1997 by some of Amblin Entertainment's former animation branch Amblimation alumni, it was spun off into a separate public company in 2004.  DreamWorks Animation currently maintains its Glendale campus, as well as satellite studios in India and China.  On August 22, 2016, NBCUniversal acquired DreamWorks Animation for $3.8 billion, making it a division of the Universal Filmed Entertainment Group.

Brown Bag Films: Brown Bag Films, or Brown Bag, is an Irish-Canadian television animation production studio, based in Dublin, Ireland with a 2D facility based in Manchester, UK.  Best known for its character CGI-animated television series' and short films, including the Oscar nominated "Give Up Yer Aul Sins" and "Granny O'Grimm's Sleeping Beauty".  Brown Bag Films was established in 1994 by Cathal Gaffney and Darragh O'Connell and the studio has garnered a number of awards, including Academy Award nominations for "Give Up Yer Aul Sins" (Best Animated Short Film 2001) and "Granny O'Grimm's Sleeping Beauty" (Best Animated Short Film 2010), six Emmy Award wins for "Peter Rabbit", an Emmy award for "Bing" and a number of BAFTA, Emmy and Annie nominations for their shows "Octonauts", "Doc McStuffins" and "Henry Hugglemonster".

Kristina Reed: Kristina Reed is an American film producer, primarily of animated films, especially the ones by DreamWorks Animation and Walt Disney Animation Studios.  She won the Academy Award for Best Animated Short Film at the Academy Award for Best Animated Short Film for the 2014 short film "Feast" at the 87th Academy Awards in 2015.

A Morning Stroll: A Morning Stroll is an English animated short film by Grant Orchard.  The film was screened at the 2011 Brooklyn Film Festival as well as the 2012 Sundance Film Festival where it won Best Animation and the Jury Prize in Animated Short Film respectively.  The film was also nominated Best Animated Short Film at the 84th Academy Awards as well as Best Short Animation at the 65th British Academy Film Awards.

Legend of the Boneknapper Dragon: Legend of the Boneknapper Dragon is a 2010 animated short film by DreamWorks Animation that is a sequel to the feature film, "How to Train Your Dragon".

Wild Life (film): Wild Life is a 2011 Canadian animated short film by Wendy Tilby and Amanda Forbis.  The film debuted at the 2011 Worldwide Short Film Festival in Toronto in June 2011 and online on January 6, 2012.  The film was nominated for Best Animated Short Film at the 84th Academy Awards, and Best Animated Short Subject at the 39th Annie Awards as well as a Genie Award for Best Animated Short at the 32nd Genie Awards.

Supporting paragraphs: How to Train Your Dragon (franchise) Legend of the Boneknapper Dragon
Answer: Legend of the Boneknapper Dragon