What does this mean write a common noun for the proper noun?

This means to replace a specific name (proper noun) with a general word that describes a category or type (common noun).

Here's a breakdown:

* Proper Noun: Refers to a specific person, place, or thing. It is always capitalized. Examples: *John*, *London*, *Amazon River*.

* Common Noun: Refers to a general category or type of person, place, or thing. It is not capitalized. Examples: *man*, *city*, *river*.

Example:

* Proper noun: *President Abraham Lincoln*

* Common noun: *president*

Let me know if you'd like more examples, and I'd be happy to help!