Question: what agency do both Léopold Eyharts and Dirk Frimout work for?
Context: Samuel Barnett (born 25 April 1980) is an English actor.  He has performed on stage, film, television and radio, and achieved recognition for his work on the stage and film versions of "The History Boys" by Alan Bennett.  His television performances include roles in the BBC comedy "Twenty Twelve" and in the Showtime drama "Penny Dreadful".  On 29 March 2016 it was announced that he had been cast as Dirk Gently in the BBC America adaptation of the "Dirk Gently's Holistic Detective Agency" book series by Douglas Adams. The Dragon Detective Agency is a series of children's books written by Gareth P. Jones and published by Bloomsbury Publishing.  The first book, called 'The Case of the Missing Cats', was published in 2006.  It involves a girl called Holly Bigsby who has lost her cat Willow.  She calls the Dragon Detective agency but she does not know that there's a dragon on the other end called Dirk Dilly.  Dirk thinks it is an investigation that he does not need to solve but he finds out there is a sinister plot behind the cat's disappearance.  He and Holly become friends and she joins him on later cases. The pilot episode of Dirk Gently is the first broadcast episode of the BBC Four television series inspired by Douglas Adams's novel "Dirk Gently's Holistic Detective Agency".  First broadcast on 16 December 2010 and repeated throughout the Christmas period, it was written by Howard Overman and stars Stephen Mangan as holistic detective Dirk Gently and Darren Boyd as his sidekick Richard Macduff.  Recurring actors include Helen Baxendale as Susan Harmison, Jason Watkins as DI Gilks and Lisa Jackson as Janice Pearce. Summer Pitt is a fictional character in the Dirk Pitt series of adventure novels written by Clive Cussler.  she is the title character's daughter.  She and her twin brother, Dirk Pitt, Jr. were raised by their mother, Summer Moran, without Dirk's knowledge.  Upon reaching adulthood, and following their mother's death, they reunited with their father.  Both she and her brother work as researchers for NUMA.  She looks exactly like her mother: she is six feet tall, with flaming red hair and pearl grey eyes.  In "Treasure of Khan", Summer is kidnapped on a diving expedition and later escapes with the help of her brother.  Along with her brother and father, she discovers a secret underwater cave. Dirk Dries David Damiaan, Viscount Frimout (born 21 March 1941 in Poperinge, Belgium) is an astrophysicist for the European Space Agency.  He flew aboard NASA Space Shuttle mision STS-45 as a payload specialist , making him the first Belgian in space . Dirk Gently is a British comic science fiction detective television series based on characters from the novel "Dirk Gently's Holistic Detective Agency" by Douglas Adams.  The series was created by Howard Overman and stars Stephen Mangan as holistic detective Dirk Gently and Darren Boyd as his sidekick Richard MacDuff.  Recurring actors include Helen Baxendale as MacDuff's girlfriend Susan Harmison, Jason Watkins as Dirk's nemesis DI Gilks and Lisa Jackson as Dirk's receptionist Janice Pearce.  Unlike most detective series "Dirk Gently" features broadly comic touches and even some science fiction themes such as time travel and artificial intelligence. Dirk is a stage play adapted from the novel "Dirk Gently's Holistic Detective Agency" by Douglas Adams. Léopold Eyharts (born April 28, 1957) is a Brigadier General in the French Air Force, an engineer and ESA astronaut. Dirk Gently (born Svlad Cjelli, also known as Dirk Cjelli) is a fictional character created by Douglas Adams and featured in the books "Dirk Gently's Holistic Detective Agency" and "The Long Dark Tea-Time of the Soul".  He is portrayed as a pudgy man who normally wears a heavy old light brown suit, red checked shirt with a green striped tie, long leather coat, red hat and thick metal-rimmed spectacles.  "Dirk Gently" is not the character's real name.  It is noted early on in the first book that it is a pseudonym for "Svlad Cjelli".  Dirk himself states that the name has a "Scottish dagger feel" to it. Frank, Viscount De Winne (born 25 April 1961, in Ledeberg, Belgium) is a Belgian Air Component officer and an ESA astronaut.  He is Belgium's second person in space (after Dirk Frimout).  He was the first ESA astronaut to command a space mission when he served as commander of ISS Expedition 21.  ESA astronaut de Winne serves currently as Head of the European Astronaut Centre of the European Space Agency in Cologne/Germany (Köln).
Answer: European Space Agency