Question: On what date did the episode of "The Simpsons" that made allusions to one of the most famous hoaxes in United States history air?
Sentence (from "1988–89 North American drought"): The drought occasioned some of the worst blowing-dust events since 1977 or the 1930s in many locations in the Midwestern United States, including a protracted dust storm, which closed schools in South Dakota in late February 1988.
Relevant evidence: No