Question: What is the American animated television searies had Trey Parker as a director and has "Elementary School Musical" as one of its episodes?
Sentence (from "Elementary School Musical (South Park)"): In the episode, a new boy at school helps set off an impromptu-singing-and-dancing craze that the boys vow to never go along with, dragging them down into the dregs of unpopularity.
Relevant evidence: No