Complex sentence: Yogi and friends stopped hosting in 1988, and was next introduced by "The Down And Dirty Dinosaurs" and then in 1990, was hosted by Kenny Ford and Jennifer Love Hewitt.
Split into simpler sentences: Yogi and friends stopped hosting the show in 1988, and was next introduced by "The Down And Dirty Dinosaurs". Then in 1990, was then hosted by Kenny Ford and Jennifer Love Hewitt.