Question: In which American animated educational interactive children's television program,  created and executive produced by Chris Gifford and Valerie Walsh, did Harrison Chad have a role?

full_context: Document 1: Christopher Daniel Barnes: Christopher Daniel Barnes (born November 7, 1972), also known professionally as C. D. Barnes and C. B. Barnes, is an American actor and voice actor. He is best known for his voice role as the title superhero of the 1994 animated television series "Spider-Man", Prince Eric from "The Little Mermaid", as well as his on-screen portrayal of Greg Brady in the films "The Brady Bunch Movie" and "A Very Brady Sequel". He was also once the national teenage spokesperson for Greenpeace. Barnes earned his BA in 2004 and his MA in 2009 and enjoys reading, writing short stories, playing the guitar, and practicing yoga.
Document 2: Josh Hutcherson: Joshua Ryan "Josh" Hutcherson (born October 12, 1992) is an American actor. A native of Kentucky, Hutcherson began his acting career in the early 2000s and appeared in several commercials and minor film and television roles before landing his first major role in 2002 in the pilot episode of "House Blend". His first film role was in "Miracle Dogs" (2003) on Animal Planet, followed by a motion-capture performance in "The Polar Express" (2004) and a voice-acting role in "Howl's Moving Castle" (2005).
Document 3: Dee Bradley Baker: Dee Bradley Baker (born August 31, 1962) is an American voice actor. His major roles, many of which feature his vocalizations of animals, include animated series such as "American Dad!", "", "Gravity Falls", "Phineas and Ferb", "", "Star Wars Rebels", "Ben 10", and "The 7D", live-action series such as "Legends of the Hidden Temple" and "Shop 'til You Drop", films such as "The Boxtrolls" and "Space Jam" and video games such as "Halo", "Gears of War", "Viewtiful Joe", and "Spore".
Document 4: Nickelodeon: Nickelodeon (often shortened to Nick) is an American basic cable and satellite television network launched on December 1, 1977, and is owned by Viacom through Viacom Media Networks and based in New York City. It is primarily aimed at children and adolescents aged 6–11 while its weekday morning edutainment programs are targeted at younger children ages 2–5.
Document 5: Go, Diego, Go!: Go, Diego, Go! is an American animated educational interactive children's television program that originally aired on the Nickelodeon children's cable network in the United States and produced by Nickelodeon Animation Studio. Created and executive produced by Chris Gifford and Valerie Walsh, the series is a spin-off of "Dora the Explorer" and follows Dora's cousin Diego, an 8-year-old boy whose adventures frequently involve rescuing animals and protecting their environment.
Document 6: Dinosaur Train: Dinosaur Train is an American/Canadian/Singaporean children's animated series created by Craig Bartlett, who also created "Hey Arnold!". The series features a curious young "Tyrannosaurus rex" named Buddy who, together with his adopted "Pteranodon" family, takes the Dinosaur Train to explore his time period, and have adventures with all kinds of dinosaurs. It is produced by The Jim Henson Company in association with Media Development Authority, Sparky Animation, FableVision, and Snee-Oosh, Inc.
Document 7: Jonathan Taylor Thomas: Jonathan Taylor Thomas ("né" Weiss; September 8, 1981) is an American actor, voice actor, and director. He is known for portraying Randy Taylor on "Home Improvement" and voicing young Simba in Disney's 1994 film "The Lion King".
Document 8: Sterling Knight: Sterling Knight (born March 5, 1989) is an American actor and musician. He is best known for playing the roles as Alex in "17 Again", Chad Dylan Cooper in Disney Channel Original Series "Sonny with a Chance" and its spinoff "So Random!", Zander Carlson in "Melissa & Joey", and Christopher Wilde in the Disney Channel Original Movie "Starstruck".
Document 9: Danny Phantom: Danny Phantom is an American superhero animated series created by Butch Hartman for Nickelodeon. It was produced by Billionfold Studios and distributed in Canada by Nelvana, a Canadian animation company. The series follows a teenage boy who, after an accident with an unpredictable portal between the human world and the "Ghost Zone", becomes a human-ghost hybrid and takes on the task of saving his town (and the world) from subsequent ghost attacks using an evolving variety of supernatural powers. He is aided in his quest by his two best friends, and later, his older sister, who for most of the series' run are among the only people who know of his double life.
Document 10: Harrison Chad: Harrison Chad (born July 17, 1992, in Plainview, New York, U.S.) is an American actor and voice actor. His roles include young Tarzan in the film "Tarzan 2", Boots on "Dora the Explorer" (2000-2007) and "Go, Diego, Go!", the singing voice of Leo on "Little Einsteins" (2005-2009) and Cardigan from "". He also has performed in a number of live-action movies, such as the Comedy Central movie, "Hebrew Hammer" and the Showtime movie, "Carry Me Home".
Document 11: All Grown Up!: All Grown Up! is an American animated television series created by Arlene Klasky and Gábor Csupó for Nickelodeon. It is a spinoff of "Rugrats" and takes place about ten years after the original series where the characters are now pre-teen to teenage. Tommy, Dil, Chuckie, Phil, Lil, Kimi, Angelica and Susie now have to deal with teenage and pre-teen issues and situations.
Document 12: Nick Jr.: Nick Jr. is an American digital cable and satellite television channel that is run by the Nickelodeon Group, a unit of the Viacom Media Networks division of Viacom, the channel's ultimate owner headquartered in New York City. The channel, which is aimed at kids under six years, features a mix of originally-produced programming, and series previously and concurrently aired on the "Nick: The Smart Place to Play" block, and its previous iterations, Nick Jr. also features the shows for preschoolers like "Team Umizoomi," "PAW Patrol," "Bubble Guppies," "Blaze and the Monster Machines," "Shimmer and Shine," and "" on Nickelodeon. Due to the Nickelodeon block, Nick Jr. is sometimes disclaimed on air as "the Nick Jr. channel" to avert confusion, especially times of day where both Nickelodeon and Nick Jr. are both carrying preschool programming.
Document 13: Dora the Explorer: Dora the Explorer is an American educational animated TV series created by Chris Gifford, Valerie Walsh, and Eric Weiner. "Dora the Explorer" became a regular series in 2000. The show is carried on the Nickelodeon cable television network, including the associated Nick Jr. channel. It aired on CBS until September 2006. A Spanish-dubbed version first aired as part of a "Nick en español" block on NBC Universal-owned Telemundo through September 2006; since April 2008, this version of the program has been carried on Univision as part of the "Planeta U" block. The series is co-produced by Nickelodeon Productions and Nickelodeon Animation Studio. "Dora the Explorer" is one of the longest-running shows of Nick Jr. During the sixth season, the show became the Nick Jr. series with the most episodes, surpassing "Blue's Clues" with 143 episodes, having 144 after it had completed broadcasting on television. It won a Peabody Award in 2003 "for outstanding efforts in making learning a pleasurable experience for pre-schoolers." It ended on June 5, 2014 after 8 seasons and 172 episodes.
Document 14: Chris Gifford (actor): Chris Gifford (born May 3, 1959) is a writer and executive producer at Nickelodeon, where he co-created the Peabody Award-winning children's series "Dora the Explorer" where he was the voice of the Big Red Chicken, the Grumpy Old Troll, the Pirate Captain Pig, etc. and its successful spin-off "Go, Diego, Go!". He was also a cast member (Danny) on the 1980s syndicated children's series, "The Great Space Coaster".
Document 15: Carter Hayden: Carter Hayden (born February 12, 1982) is a Canadian actor and voice actor. He is most well-known for his role as Noah in the animated franchise "Total Drama". He voiced Noah in the first season, "Total Drama Island", and the third season, "Total Drama World Tour". He also had a brief cameo appearance in the second season, "Total Drama Action", and later reprised the role in both "Skatoony", as well as the official spin-off series "". Noah has since become one of the most popular "Total Drama" characters, and for his performance in the third season (for which he had to sing on several occasions), Hayden was nominated for "Best Voice Actor in a TV Series" in the 2011 ToonZone Awards.
ground_truth: "Go, Diego, Go!