Complex sentence: He is a past president of the National Society of Newspaper Columnists, whose best columnist (under 100k) award he won in 1998, the same year he won first place in the American Association of Sunday and Features Writers national features writing contest.
Split into simpler sentences: He is a past president of the National Society of Newspaper Columnists. He won best columnist (under 100k) award in 1998, the same year he won first place in the American Association of Sunday and Features Writers national features writing contest.