Complex sentence: Raoul arrives at the lair to find that the Phantom has dressed Christine in a wedding gown; the Phantom ambushes him with the Punjab lasso, suspended from above, so that Raoul cannot move without strangling himself.
Split into simpler sentences: Raoul arrives at the lair to find that the Phantom has dressed Christine in a wedding gown. The Phantom ambushes him with the Punjab lasso, suspended from above, so that Raoul cannot move without strangling himself.