The Simpsons as they appeared on “The Tracey Ullman Show” in 1989. (Photo courtesy of FOX)

April 19th marks the 28th anniversary of the first appearance of The Simpsons on the “Tracey Ullman Show.”

Here are some things you may not have known about The Simpsons.

First: The characters were created by Matt Groening to star in short cartoons featured before and after commercial breaks on “The Tracey Ullman Show.” Groening decided to create the family at the last minute instead of signing over the rights to his popular “Life In Hell” comic.

Second: Ullman sued Fox saying her contract entitled her to profits from “The Simpsons” after the show was spun-off. Her claim was rejected.

Third: In 1997, “The Simpsons” became the longest-running primetime animated series, passing “The Flintstones.” In 2004, the show passed “The Adventures of Ozzie and Harriet” as the longest-running sitcom in American TV history.

Which brings us to our question: “The Simpsons” passed what show in 2009 to become the longest-running scripted primetime show in terms of seasons on the air?

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