Complex sentence: After months Mort's wife comes to believe that John Shooter was a ghost her husband had created, although it is implied that it may have been the ghost of a man that Mort had once stolen a short story from.
Split into simpler sentences: After months Mort's wife comes to believe that John Shooter was a ghost her husband had created. Although it is implied that it may have been the ghost of a man that Mort had once stolen a short story from.