Consider the question. The 2003 World Series was the championship series of Major League Baseball's (MLB) 2003 season. The 99th edition of the World Series, it was a best-of-seven playoff between the National League (NL) champion Florida Marlins and the American League (AL) champion New York Yankees; the Marlins defeated the heavily favored Yankees, four games to two. The series was played from October 18 -- 25, 2003. This is the most recent Series in which the losing team outscored the winning team; the Yankees lost, despite outscoring the Marlins 21 -- 17 in the Series. This was the Marlins' second World Series championship win, having won their first in 1997. As of 2017, this is the Marlins' last appearance not only in the World Series, but in the postseason at all.

Answer this question based on the passage: who did the marlins beat in the 2003 world series?
What is the step-by-step reasoning process to arrive at the answer: the heavily favored Yankees?
The relevant information is: The 99th edition of the World Series, it was a best-of-seven playoff between the National League (NL) champion Florida Marlins and the American League (AL) champion New York Yankees; the Marlins defeated the heavily favored Yankees, four games to two.