Complex sentence: The season ended with the New York Yankees defeating the New York Mets in Game 5 of the World Series, known as the Subway Series because fans could take the Subway to and from every game of the Series.
Split into simpler sentences: The season ended with the New York Yankees defeating the New York Mets in Game 5 of the World Series. Known as the Subway Series because fans could take the Subway to and from every game of the Series.