A Possible Answer:
Maria (proper noun) walks her dog (common noun) around the neighborhood (common noun) every Monday (proper noun) to give him exercise (common noun).
Explanation:
A <em>proper noun</em> is a noun naming a specific person, place, or thing - examples are a person's name (e.g., Maria or Carlos) or the name of a location (e.g., New York or Amsterdam).
A <em>common noun</em> is a noun naming an everyday person, place, or thing - examples include dog, happiness, teacher, and idea.
