Question: Which of the short films contained in "How to Train Your Dragon" franchise is a 2010 animated short film by DreamWorks Animation?
Related documents: [0]  [DOC] 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. [END] 
[1]  [DOC] 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". [END] 
Answer: 
Legend of the Boneknapper Dragon
Legend of the Boneknapper Dragon