Answer:
Common nouns usually name general places, things, ideas or people, so they are not capitalized unless they are placed at the beginning of a sentence. Proper nouns, on the other hand, name specific or particular people, places, organizations, nationalities, languages, religions, etc., and are always capitalized.
Moreover, compound nouns 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 International Olympic Committee is a compound, proper noun and brother, representative and also teams are common nouns.