"A text's format is its organizing structure. An author may change the structure of a literary work to emphasize distinctions, particularly when attempting to convey information about the contrasts between various events, characters, or other parts of the work. Changing the format can also clarify the plot." Changing the format is often done to make the story or poem more accessible to a reader who is not familiar with the original version. A writer may do this to avoid repeating elements in the work that are known by most readers to be important for understanding the story or concluding a poetic sequence. For example, if you were writing a novel about Romeo and Juliet but did not know their story was going to end up being so famous, you might have included some kind of note with your publication explaining what had happened in order to help readers understand why these two young people would die. This note would have served to explain to readers something that might otherwise be surprising at the end of the story. To illustrate this point, look at how Charles Dickens ended A Tale of Two Cities with a frame story that explained what had happened in France since the story began. Although readers knew from the beginning that two terrible things would happen to cause chaos in Paris, Dickens added the frame story to help readers understand why it was happening and what would happen next in the story.