Complex sentence: Stephon Marbury also helped the East by hitting two three-pointers in the final 53 seconds, including one with 28 seconds left, which proved to be the game-winner.
Split into simpler sentences: Stephon Marbury also helped the East by hitting two three-pointers in the final 53 seconds. He hit the second three pointer with 28 seconds left, it would be the game-winner.