Complex sentence: Hairy Maclary is a fictional dog, the hero of a series of children's books created by the New Zealand author Lynley Dodd, and making his first appearance in 1983 with the publication of "Hairy Maclary From Donaldson's Dairy".
Split into simpler sentences: Hairy Maclary is a fictional dog, the hero of many books written for children. Hairy made his first appearance in 1983 with the publication of "Hairy Maclary From Donaldson's Dairy".