Complex sentence: Brian inside a Telephone booth calls His parents, and tells them that Eric is fine and that They're in Malibu, and When His Parents ask why they're in Malibu, Brian responds that it's a long story.
Split into simpler sentences: Brian inside a telephone booth calls his parents, and tells them that Eric is fine and that they're in Malibu. When his parents ask why they're in Malibu, Brian responds that it's a long story.