Complex sentence: The 2007 NBA Champions was the San Antonio Spurs, who won their fourth title in the last 9 years by defeating the Cleveland Cavaliers 4 games to 0 in the NBA Finals.
Split into simpler sentences: The 2007 NBA Champions were the San Antonio Spurs who won their fourth title in the last nine years. They defeated the Cleveland Cavaliers 4 games to 0 in the NBA Finals.