Complex sentence: The player and Polly must retrieve a parchment from a young minuteman in Boston so Jefferson can redraft the declaration, after which the player and Polly find General Mayhem hiding in Jefferson's dumbwaiter and arrest him for the second time.
Split into simpler sentences: The player and Polly must retrieve a parchment from a young minuteman in Boston, so Jefferson can redraft the declaration. After redrafting it, the player and Polly find General Mayhem hiding in Jefferson's dumbwaiter and arrest him for the second time.