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?
Sentence (from "Starvin' Marvin (South Park)"): Later, Cartman is accidentally sent to Ethiopia, where he learns activist Sally Struthers is hoarding the charity's food for herself.
Relevant evidence: No