Complex sentence: After defeating the San Francisco Giants in a heated NL Championship Series, Herzog's Cardinals found themselves in their 3rd World Series contest of the 1980s; the Minnesota Twins defeated the Cardinals in the 1987 World Series in seven games.
Split into simpler sentences: After defeating the San Francisco Giants in a heated National League Championship Series, Herzog's Cardinals found themselves in their 3rd World Series contest of the 1980s. The Minnesota Twins defeated the St. Louis Cardinals in the 1987 World Series in seven games.