Complex sentence: It reached number eight in the United States in December, 1960 by Rockabilly singer Johnny Burnette and then thirteen years and one month later, a cover version by Ringo Starr hit number one.
Split into simpler sentences: It reached number eight in the United States in December, 1960 by Rockabilly singer Johnny Burnette. In January 1974, a cover version by Ringo Starr hit number one.