Complex sentence: The men confront them at gunpoint and claim that the island is theirs threatening to cut of Juliet's hand John Locke (Terry O'Quinn) shows up and kills the men, freeing Juliet and Sawyer.
Split into simpler sentences: The men confront them at gunpoint and claim that the island is theirs. They threaten to cut off Juliet's hand, but John Locke (Terry O'Quinn) shows up and kills the men, freeing Juliet and Sawyer.