Question:  "Member Berries" is the first episode in the twentieth season of the American animated television series "South Park",  an American adult animated sitcom created by which two people?
Sentence (from "South Park: Bigger, Longer &amp; Uncut"): South Park: Bigger, Longer & Uncut is a 1999 American adult animated musical comedy film based on the Comedy Central animated television series "South Park".
Relevant evidence: No