Question: Who created both The Return of Chef and South Park?

Context paragraphs:
Chef Aid: The South Park Album: Chef Aid: The South Park Album is a 1998 soundtrack/compilation album based on the American animated comedy series "South Park".  Several well-known artists perform on the record, which was mainly produced by Rick Rubin.  "Chef Aid" contains a number of songs from and inspired by the show, while other songs are largely independent from "South Park".  The album was released during the show's second season, shortly after the broadcast of the episode called "Chef Aid", which features many of the stars and songs that appear on the recording.  Soul singer Isaac Hayes appears in character as Chef throughout the album, which mimicks a live concert.

South Park, Houston: South Park is a broad post-World War II development in the south-central area of Houston, Texas, a few miles south of MacGregor Park (from which it gets its name) and directly south of the 610 Loop.  According to the 2000 Census, the community has a population of 22,282.  81% of the South Park population is predominately African American, compared to 25% for the city as a whole.  Houston's Martin Luther King Boulevard runs through the area.  Reflecting its postwar origins, many streets in South Park are named after World War II battle sites and persons.  In the 1980s and 1990s crime became a key issue for South Park.  Katharine Shilcutt of the "Houston Press" said "South Park is an overgrown garden these days, its soil only able to be tilled by the most determined or the most desperate.  It shows no sign that it will grow again any time in the near future."

South Park Let's Go Tower Defense Play!: South Park Let's Go Tower Defense Play!  is a 2009 video game based on the American animated television series "South Park", released on the Xbox Live Arcade service for the Xbox 360 video game console.  The game was developed by Doublesix in collaboration with South Park Digital Studios and Xbox Live Productions.  "Let's Go Tower Defense Play" is a tower defense game, with the added element of being a fast-paced action game as well.  Thus, players do not only build towers to eliminate destructive forces, but they also have to control multiple characters in order to successfully protect the town of South Park.  "South Park Let's Go Tower Defense Play!"  is the first "South Park" video game released after three early titles released between 1998 and 2000.

South Park (season 10): The tenth season of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on March 22, 2006.  The tenth season concluded after 14 episodes on November 15, 2006.  This is the first season in which Kenny does not die and the last season featuring Isaac Hayes (the voice of Chef) as Hayes quit the show following the backlash behind season nine's "Trapped in the Closet" episode.  This season also had a minor controversy when the Halloween episode "Hell on Earth 2006" depicted "The Crocodile Hunter's" Steve Irwin with a stingray lodged in his chest getting thrown out of Satan's Halloween party for not being in costume.  Episode 2 in this season is the last one with the Braniff Airlines logo.  All the episodes in this season were written and directed by Trey Parker.

South Park: Chef's Luv Shack: South Park: Chef's Luv Shack is a 2D game show-style party video game based on the television show "South Park".  It was released in 1999 for the Nintendo 64, Dreamcast, PlayStation and Microsoft Windows.  Its gameplay involves playing minigames and the ability to play against other players in a challenge for the most points.  It also involves trivia questions about "South Park" and other topics.

The Return of Chef: "The Return of Chef" is the first episode in the tenth season of the American animated television series "South Park".  The 140th episode of the series overall, it first aired on Comedy Central in the United States on March 22, 2006.  The episode was the first after the departure of actor Isaac Hayes, who voiced the character Chef.  Hayes, a Scientologist, left after a falling-out with the creators over their treatment of Scientology in the previous season's episode "Trapped in the Closet".  Scientology has been accused of using brainwashing techniques, and the episode portrays Chef as having been brainwashed.

Fatbeard: "Fatbeard" is the seventh episode of the thirteenth season of the American animated television series "South Park".  The 188th overall episode of the series, it originally aired on Comedy Central in the United States on April 22, 2009 and in the United Kingdom on April 24, 2009.  It was the mid-season finale, marking the final "South Park" episode for six months.  In the episode, Cartman misinterprets news reports about piracy in the Indian Ocean to mean the return of the classic era of swashbuckling pirates, and misleads a handful of South Park boys to voyage to Mogadishu to start a pirate crew.

South Park, Seattle: South Park is a neighborhood in the city of Seattle, in the U.S. state of Washington.  It is located just south of Georgetown across the Duwamish River, and just north of the city of Tukwila.  Its main thoroughfares are West Marginal Way S. (northwest- and southeast-bound), S. Cloverdale Street (east- and westbound) and 14th Ave. S (north-and-south).  South Park connects to Georgetown by two bridges at 1st Ave S. at the northmost end of the neighborhood, and the South Park Bridge at the north end of 14th Ave. South.  The South Park Bridge was closed on June 30, 2010 and reconstructed due to safety concerns.  The newly constructed bridge reopened to traffic on June 30, 2014.

Chef (South Park): Jerome "Chef" McElroy is a cartoon character on the Comedy Central series "South Park" who was voiced by soul singer Isaac Hayes.  A cafeteria worker (as his nickname implies) at the local elementary school in the town of South Park, Colorado, Chef is generally portrayed as more level-headed than the other adult residents of the town, and sympathetic to the kids.  His guidance is often sought by the show's core group of child protagonists – Eric Cartman, Stan Marsh, Kyle Broflovski, and Kenny McCormick – as he is usually the only adult whom they consistently trusted.  To an inadvertent fault, he frequently gives inappropriate advice, usually in the non sequitur form of a lascivious soul song.

South Park School District: South Park School District is a small, suburban, public school district located in southern in Allegheny County.  It serves the residents of South Park, Pennsylvania, a suburb of Pittsburgh, Pennsylvania.  South Park School District encompasses approximately 9 mi2 square miles.  Per 2001 local census data, it serves a resident population of 14,340.  In 2009 the districts residents' per capita income was $21,538, while the median family income was $57,290.  According to District officials, in school year 2007/08 the South Park School District provided basic educational services to 2,216 pupils through the employment of 153 teachers, 78 full-time and part-time support personnel, and 14 administrators.  South Park School District received more than $9.9 million in state funding in school year 2007/08.

Supporting paragraphs: The Return of Chef South Park (season 10)
Answer: Trey Parker and Matt Stone