Complex sentence: Eventually a lighthouse is constructed on the Great Isabel threatening Nostromo's ability to recover the treasure in secret, but the ever resourceful Nostromo manages to have a close acquaintance, the widower Giorgio Viola, named as its keeper.
Split into simpler sentences: Eventually a lighthouse is constructed on Great Isabel, threatening Nostromo's ability to recover the treasure in secret. The ever resourceful Nostromo manages to have a close acquaintance, the widower Giorgio Viola, named as its keeper.