Complex sentence: The National League dominated from 1950--1987, winning 33 of 42 with 1 tie, including a stretch from 1963-1982 when they won 19 of 20.
Split into simpler sentences: The National League dominated from 1950--1987, winning 33 of 42 with 1 tie. This included a stretch from 1963-1982 when they won 19 of 20.