Question: Unlike the episode "Today I Am a Clown", which has a religious theme, "The Simpsons"' episode "Alone Again, Natura-Diddily" demonstrates what theme?
Sentence (from "Today I Am a Clown"): "Today I Am a Clown" is the sixth episode of "The Simpsons"<nowiki>'</nowiki> fifteenth season.
Relevant evidence: Yes