Question: "A Test Before Trying" is the tenth episode of the 24th season of "The Simpsons", theepisode is dedicated to the memory of Huell Howser, who appeared in the episode "O Brother, Where Bart Thou?", which is he eighth episode of which season?
Sentence (from "O Brother, Where Bart Thou?"): is the eighth episode of "The Simpsons"' 21st season.
Relevant evidence: Yes