People:
* John Smith: A specific person
* Queen Elizabeth II: A specific ruler
* Albert Einstein: A specific scientist
* Taylor Swift: A specific singer
* The Beatles: A specific band
Places:
* New York City: A specific city
* Mount Everest: A specific mountain
* The Great Wall of China: A specific structure
* The Sahara Desert: A specific desert
* The Amazon Rainforest: A specific forest
Things:
* The Mona Lisa: A specific painting
* The Eiffel Tower: A specific structure
* The Titanic: A specific ship
* The Declaration of Independence: A specific document
* The Star Wars franchise: A specific film series
Organizations:
* Google: A specific company
* The United Nations: A specific international organization
* NASA: A specific government agency
* The Red Cross: A specific charitable organization
* The New York Times: A specific newspaper
Events:
* World War II: A specific historical event
* The Olympics: A specific sporting event
* The Super Bowl: A specific sporting event
* Thanksgiving: A specific holiday
* The Renaissance: A specific historical period
Animals:
* Lassie: A specific dog
* Snowball: A specific cat
* Champ: A specific horse
* Humphrey: A specific elephant
* The Queen Mary: A specific ship (sometimes given a proper noun like a person)
Remember that proper nouns are always capitalized. They refer to specific and unique entities, unlike common nouns that refer to general categories (e.g., city, mountain, painting, company).