Complex sentence: Parker confirmed the name of the book that has since become the nickname for the Everglades when Douglas, trying to capture the essence of the Everglades, asked if she could safely call the fresh water flowing from Lake Okeechobee a river of grass.
Split into simpler sentences: Parker confirmed the name of the book that has since become the nickname for the Everglades when Douglas, trying to capture the essence of the Everglades,! I am amazing! asked if she could safely call the fresh water flowing from Lake Okeechobee a river of grass.