Complex sentence: The Cairn Terrier has a harsh, weather-resistant outer coat that can be cream, wheaten, red, sandy, gray, or brindled in any of these color black, black and tan, and white are not permitted by many kennel clubs.
Split into simpler sentences: The Cairn Terrier has a harsh, weather-resistant outer coat that can be cream, wheaten, red, sandy, gray, or brindled in any of these color. Pure black, black and tan, and white are not permitted by many kennel clubs.