Cartoonist Matt Groening had no idea his one-off animated episode of "The Simpsons" in 1987 would become America’s longest-running sitcom, now beginning its 37th season. Seth Doane talks with Groening about the show’s enduring appeal (and propensity to predict the future), and visits The Annecy International Animation Film Festival in France, where the art of animation is celebrated. https://cbsn.ws/437NDs2 | CBS Sunday Morning