Question: "Walnuts & Rain" is an episode featured in which season of the American animated television series created by Pendleton Ward and featuring characters Finn and Jake?
Sentence (from "Adventure Time (season 6)"): Finn and Jake live in the post-apocalyptic Land of Ooo, where they interact with the other main characters of the show: Princess Bubblegum, The Ice King, Marceline the Vampire Queen, Lumpy Space Princess, BMO, and Flame Princess.
Relevant evidence: No