Question: Who provides the voice for "Chef" in the Comedy Central series "South Park" on the "Starvin Marvin" episode where Chef tries to get residents to fight back in a parody of the movie Braveheart?
Context: "Starvin' Marvin" is the eighth episode in the first season of the American animated television series "South Park".  It first aired on Comedy Central in the United States on November 19, 1997.  In the episode, Cartman, Kenny, Kyle and Stan send money to an African charity hoping to get a sports watch, but are instead sent an Ethiopian child whom they dub "Starvin' Marvin".  Later, Cartman is accidentally sent to Ethiopia, where he learns activist Sally Struthers is hoarding the charity's food for herself.  In an accompanying subplot, after genetically engineered turkeys attack South Park residents, Chef rallies the residents to fight back, in a parody of the film "Braveheart". "Quintuplets 2000" ("Contorting Quintuplets 2000" in some syndicated markets and "Quintuplets" on the South Park Studios website) is the fourth episode of the fourth season of the Comedy Central series "South Park", and the 52nd episode of the series overall.  It was originally broadcast on April 26, 2000.  The episode is based on the Dionne quintuplets and the then-recent Elián González affair, who had been taken by federal authorities four days before the episode aired. 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. "Hooked on Monkey Fonics" is episode 12 of season 3 and the 43rd overall episode of Comedy Central's animated series "South Park".  It originally aired on November 10, 1999.  It features issues of homeschooling and phonics, a method of teaching children to read.  This is the final episode of South Park to feature the voice talents of Mary Kay Bergman, who committed suicide the day after the episode aired.  The final episode to use her dialogue was "Starvin' Marvin in Space" which ended production shortly before her death. "Death" is the sixth episode in the first season of the American animated television series "South Park".  It originally aired on Comedy Central in the United States on September 17, 1997.  In the episode, Grandpa Marvin tries to convince Stan to kill him, while the parents of South Park protest the foul-mouthed cartoon "Terrance and Phillip".  Death himself arrives to kill Kenny, and presents a warning to Grandpa Marvin against forcing others to help him commit suicide. Starvin' Marvin in Space is episode 44 of the animated television series South Park.  It originally aired on Comedy Central in the United States on November 17, 1999.  Like the episode Mr. Hankey's Christmas Classics, the episode is dedicated to Mary Kay Bergman, who lent her voice to nearly all of South Park's female characters.  This was the last show to use dialogue by Bergman, who committed suicide shortly after production was completed. "Super Best Friends" is the third episode of the fifth season of the American animated television series "South Park", and the 68th episode of the series overall.  It first aired on Comedy Central in the United States on July 4, 2001.  In the episode, Stan, Kyle, Cartman and Kenny discover the magician David Blaine performing in South Park and decide to join his cult, the Blaintologists.  Stan quickly finds out that the Blaintologists are not as nice as everyone thinks and tries to convince the other boys they've been brainwashed, and have forsaken their friends and families.  Teaming up with Jesus, Stan calls upon the Super Best Friends, a parody of the Super Friends, to destroy Blaine and thwart the mass suicide pact he has launched. "Red Man's Greed" is the seventh episode of the seventh season and the 103rd overall episode of the Comedy Central series "South Park", first broadcast on April 30, 2003.  It is a parody of the Native American removal policies from the 17th century to the 19th century.  The episode features Alex Glick, who won a guest voice role in the episode in a contest. "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. 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.
Answer: soul singer Isaac Hayes