I think that this can be done quite easily.  If you are writing a paragraph about the worst time in your life, or a time in which you were the happiest with others, this could be done quite easily.  At some level, it would be easy to do because when we write about or tell stories about situations, we use pronouns to simplify the process.  It ruins the flow of the story to constantly use proper names and nouns.  At some level, substitutions are needed in order to maintain the focus of the story.  Try this yourself:  Describe a situation without prounouns.  The situation would be quite awkward because the situation's development would be stalled by constantly referring to proper nouns in the situation (I just did this here with "the situation.")

1.  The man killed her after he had been released from prison. 
2.  She came home late, and her parents were not pleased.
3.  He could not believe the news about his old sweetheart.
4.  The man had lost respect for his oldest friends.
5.  Bill and George joined us for the Thanksgiving Day dinner.
6.  They were happy to hear the news although it was not all good.
7.  We were amazed at what we saw outside the theatre.
8.  I am happy summer is almost here.
9.  Their decisions were not good ones.
10.  Everybody stood and cheered for the returning players.

1. This is not a difficult thing to do.
2. I know what pronouns are.
3. If I showed you a pronoun, I imagine you would be able to identify it.
4. It is not that hard of a task.
5. I asked my daughter and she knows how to do it.
6. I showed her the question and she asked "what kind of question is this?"
7. She is about to be 8 years old.
8. Her birthday is coming up in a couple of weeks.
9. I have to bake a cake for her.
10. I hope it will come out well.