Complex sentence: His columns and cartoons were distributed by the Newspaper Enterprise Association (NEA), a Scripps-Howard syndicate.He joined the NEA in 1952, became its sports editor in 1964, its executive editor in 1968, a contributing editor in 1971.
Split into simpler sentences: His columns and cartoons were distributed by the Newspaper Enterprise Association (NEA), a Scripps-Howard syndicate. His employment with the NEA began in 1952, he became its sports editor in 1964, and its executive editor in 1968, a contributing editor in 1971.