Question: "Funnybot" is the second episode of the fifteenth season of which American animated television series, created by Trey Parker and Matt Stone?  
Sentence (from "Funnybot"): "Funnybot" premiered in the United States on Comedy Central on May 4, 2011, the first time a "South Park" episode has aired in May since season 10's "Tsst" in 2006.
Relevant evidence: Yes