Complex sentence: Shar Pei were named in 1978 as one of the world's rarest dog breeds by "Time" magazine and the "Guinness World Records", and the American Kennel Club did not recognize the breed until 1991.
Split into simpler sentences: Shar Pei were named in 1978 as one of the world's rarest dog breeds by "TIME" magazine and the "Guinness World Records". The American Kennel Club did not recognize the breed until 1991.