Complex sentence: In June 1989, the Canaan dog entered the American Kennel Club Miscellaneous Class and dogs were registered in the AKC Stud Book as of June 1,1997.
Split into simpler sentences: In June 1989, the Canaan dog entered the American Kennel Club Miscellaneous Class. Canaan dogs were registered in the AKC Stud Book as of June 1,1997.