proper noun in a sentence

Examples

1. Extreme Programming is a proper noun for a unique entity.
2. Is it still a proper noun when used this way?
3. Derogatory words, disease names and proper nouns are frowned upon.
4. Don't capitalise unless Contribution to Cinema is a proper noun.
5. Mass media use mostly these ones, except for proper nouns.
6. I found out that it can't be a proper noun.
7. In French, only proper nouns are capitalized, not derived adjectives.
8. I removed the capitals because they're not proper nouns.
9. :Do you remember ANY specific proper noun in in?
10. He dislikes proper nouns and rejects all song lyrics.