William Shakespeare

William Shakespeare was an English poet and playwright. His work has been referenced multiple times in the series:
 * Catherine was trying to read Shakespeare when Francine was turning the lights on and off. "Francine Frensky, Superstar"
 * Mr. Ratburn remembers his one-man Hamlet puppet show in "Elwood City Turns 100!".
 * In the opening of "Kiss and Tell," D.W. appears as Juliet from Shakespeare's famous Romeo and Juliet. D.W. continually waits for Romeo on the balcony, but Prince Charming shows up instead.
 * Also in "Kiss and Tell," it is mentioned that Arthur's class is reading Romeo and Juliet. Arthur tells D.W. a bit about the plot, and the book and a picture in it is seen.
 * A line from Shakespeare's Hamlet, "To be or not to be.", is referenced in the titles of "To Beat or Not to Beat" and "To Eat or Not to Eat".
 * Buster mentions that he has a yam named "Yamlet" in "Prunella the Pack Rat," a reference to Hamlet. Also, when he receives a beet from Prunella, he remarks "To beet or not to beet."
 * The episode MacFrensky has a plot line similar to Macbeth, with its name also referencing the play.
 * In that same episode, Mr. Ratburn quoted William Shakespeare, saying "truth rolls out, as the Bard says".
 * Fern imagines seeing the Bard several times throughout "Fern and the Case of the Stolen Story". He criticizes her work and tells her it's OK to sometimes get writer's block.
 * In the opening of Popular Girls, Arthur, Francine, Fern, and Sue Ellen were shown performing MacBeth.