Here's an example:
* Original sentence: "The dog wagged its tail."
* Substitute with a noun: "The dog wagged the tail."
Here are some other ways to substitute pronouns:
* Use a specific noun: Instead of "he," you could say "John."
* Use a descriptive phrase: Instead of "they," you could say "the people in the room."
* Use a noun clause: Instead of "it," you could say "what happened yesterday."
Let me know if you have a specific pronoun in mind and would like to see more substitutes!