Answer:
A proper noun is a noun that defines a specific name for a particular person, place or thing and is always capitalized, such as Texas. A compound noun is a noun made up of two (or more) words that form a noun. A compound proper noun is a combination of both, such as South Africa. A sentence that includes both a compound proper noun and a proper common noun could be:
There are just a few schools in the world -some in South Africa and the one I attend in Texas- that follow a multiage learning system.