Answer:
<u>Common nouns</u> usually name general places, things, ideas or people, so they are not capitalized unless they are placed at the beginning of a sentence. <u>Proper nouns</u>, on the other hand, name specific or particular people, places, organizations, nationalities, languages, religions, etc., and are always capitalized.
Moreover, <u>compound nouns</u> are nouns or noun phrases that consist of two or more lexemes.
Therefore, a sentence that include a compound proper noun and two common nouns would be: the International Olympic Committee (OIC) designed my dear brother as the media representative for Asian teams, because <em>International Olympic Committee</em> is a <u>compound, proper noun</u> and <em>brother, representative</em> and also<em> teams</em> are <u>common nouns</u>.