Question: "Gnomes" is the seventeenth episode in the second season of the American animated television series "South Park", Season two of "South Park", an American animated television series created by Trey Parker and Matt Stone, began airing on which date?
Sentence (from "South Park (season 2)"): The second season concluded after 18 episodes on January 20, 1999; it remains the longest season of "South Park" to date.
Relevant evidence: No