-Make up sentences. They cannot be from a pre-existing book, magazine, movie, poem, etc.
-No established characters if there is a person in the sentence. If you're going to have a person in it, make them up.
-Nothing inappropriate (i.e., follow BZP rules here)
These are some examples from Chris Van Allsburg's book The Mysteries of Harris Burdick that kind of follow a rough idea of how I want to do this project, with a very narrative feel:
Under the Rug:
Two weeks passed and it happened again.
The Seven Chairs
The fifth one ended up in France.