Complex sentence: The next year, on June 21,2012, Spoelstra's Heat won the NBA Finals against the Oklahoma City Thunder 4-1, becoming the second Heat head coach to win a title.
Split into simpler sentences: The next year, on June 21,2012, Spoelstra's Heat won the NBA Finals against the Oklahoma City Thunder 4-1. Spoelstra became the second Heat head coach to win a title.