Question: When did the short series, in which Tom Herpich is best known for, become commissioned into a full-length series?

Context paragraphs:
Peter Clover: Peter Clover (b. Islington, North London, 9 June 1952) is an English children's book author and illustrator best known for the "Sheltie the Shetland Pony" series, featuring a young girl, Emma, and her shaggy Shetland pony.  In addition Peter Clover has created four other short series: "Rescue Riders", "Hercules", "Donkey Diaries", and "Little Bridge Farm", along with numerous standalone titles.

Vas Defrans: Vas Defrans, a five-piece experimental rock band based in North Hollywood, is known for their appearance at the Coachella Valley Music and Arts Festival in the summer of 2008 , as well as their frequent live performances that are both high-energy and display a high level of technical proficiency.  The group consists of drummer Kane Ritchotte, guitarists Dash LeFrancis and Cary Singer, vocalist Vincent Coleman, and bassist Max Whipple.  Originally LeFrancis performed as the band's vocalist, but in late 2007 he decided to devote his energies to lead guitar and after a short series of auditions, Singer was added in mid-2009, and Coleman in mid-2010.  The group is currently gearing up for their first full-length album.

Cliff Bowes: Cliff Bowes (November 11, 1894 – July 6, 1929), also known as Clifford Bowes, was an American silent film actor.  Born on November 14, 1894 in Pueblo, Colorado, Bowes began his film career with a small, un-credited role in the 1916 film short "His Lying Heart", starring Ford Sterling.  When the United States entered World War I, Bowes served as a navy pilot.  By the end of the decade he was starring in shorts, and during the 1920s he made over 100 of them.  In 1920, he would have the featured role of Waldo Pennanink in his only full-length film, "Up in Mary's Attic".  In 1923 he began starring in the Education Pictures film short series "Mermaid Comedies", which ran through 1925.  He is best remembered for another Education series, "Cameo Comedies", which co-starred Virginia Vance, which also began in 1923 and ran through 1929.  His final screen performance was in a supporting role in 1929's "Stage Struck Susie", starring Frances Lee.  At the age of 34, Bowes died on July 6, 1929, shortly after the release of "Stage Struck Susie", and was buried in Forest Lawn Memorial Park in Glendale, California.

Hirohiko Araki: Hirohiko Araki (Japanese: 荒木 飛呂彦 , Hepburn: Araki Hirohiko , born June 7, 1960 in Sendai, Miyagi) is a Japanese manga artist.  He made his debut under the name Toshiyuki Araki (荒木 利之 , Araki Toshiyuki ) in 1980 with his one-shot "Poker Under Arms", and began his professional career with the short series "Cool Shock B.T.", "Baoh", and "The Gorgeous Irene".  Araki is best known for his long-running series "JoJo's Bizarre Adventure", first published in "Weekly Shōnen Jump" in 1986 and which to date has sold over 100 million copies in Japan alone, which is known for its frequent references to Western rock music and Italy, both of which Araki is reportedly very fond of.

Five Short Graybles: "Five Short Graybles" is the second episode of the fourth season of the American animated television series "Adventure Time".  The episode was written and storyboarded by Tom Herpich, Skyler Page, and Cole Sanchez, from a story by Patrick McHale, Kent Osborne, and Pendleton Ward.  It originally aired on Cartoon Network on April 9, 2012.  The episode guest stars Emo Philips as Cuber.

Kaos Theory: Kaos Theory was a short series of compilation albums by Telstar Records which were compiled from "hardcore rave" records that were not on general release to the public.  Many of these artists would later become known for their drum and bass material.

Nick Arnold (writer): Nick Arnold (born 4 August 1964) is a British writer of science books for children.  He is best known for the long series "Horrible Science", illustrated by Tony De Saulles, and the short series "Wild Lives", illus.  Jane Cope.  His other works include some published under the name Robert Roland.

Adventure Time: Adventure Time is an American animated television series created by Pendleton Ward for Cartoon Network.  It follows the adventures of a boy named Finn (voiced by Jeremy Shada) and his best friend and adoptive brother Jake (John DiMaggio)— a dog with the magical power to change shape and size at will.  Finn and Jake live in the post-apocalyptic Land of Ooo, where they interact with Princess Bubblegum (Hynden Walch), the Ice King (Tom Kenny), Marceline the Vampire Queen (Olivia Olson), BMO (Niki Yang), and others.  The series is based on a 2007 short produced for Nicktoons and Frederator Studios' animation incubator series "Random!  Cartoons".  After the short became a viral hit on the Internet, Cartoon Network commissioned a full-length series, which previewed on March 11, 2010, and officially premiered on April 5, 2010.

Safa Karman: Safa Abdulsalam Karman (born June 5, 1987) is a Yemeni journalist who works with Al Jazeera Media Network based in Doha, Qatar.  She is the first Yemeni citizen to get admitted into Harvard Law School where she is expected to get her masters degree in law (LL.M.)  in 2018.  She also went to Oxford University where she studied Masters in Public Policy (MPP).  Safa co-founder and board member of "Be A Human Initiative" which is the first of its kind NGO in Yemen that provide psychological treatment and support for war-zone civilians suffering from war and conflict-related Post Traumatic Stress Disorder (PTSD).  Safa is best known for her highly acclaimed investigative documentary ""the Road to Sana’a"" which was aired on Al Jazeera Arabic and Al Jazeera English.  The film examined who paved the way for the Houthi Militias to take over the Yemeni capital, Sana’a.  Safa is also known for her short series of reports " "Yemen, the Land and the People"", her coverage of the Egyptian elections in 2012, and her reporting on the Arab Spring especially Yemen's 2011 revolution.  Safa Karman is the first Yemeni female journalist to join Al Jazeera and the youngest to be given top news coverage by the time.  Before joining Al Jazeera in October 2010, Safa worked for two years as an English teacher at one of Yemen's top English Institutes, Exceed Language Center.  She earned her bachelor's degree in Law and Sharia Law from Sana'a University in 2009.

Tom Herpich: Thomas Herpich (born October 1979) is an American artist who is best known for being a writer and storyboard artist on the animated television series "Adventure Time".

Supporting paragraphs: Tom Herpich Adventure Time
Answer: March 11, 2010