Complex sentence: Meanwhile Elizabeth's father, Governor Swann, frees her, though he is himself arrested by Beckett, and she after making a deal with Beckett takes the Letters of Marque and stows away on a ship to find Will and Jack.
Split into simpler sentences: Meanwhile Elizabeth's father, Governor Swann, frees her, though he is himself arrested by Beckett. Elizabeth leaves after making a deal with Beckett, taking the Letters of Marque with her and stows away on a ship to find Will and Jack.