What is a proper noun

A proper noun is a noun that identifies a single entity and is used to refer to that entity, such as London, Jupiter, Sarah, or Microsoft

Explanation:

A proper noun is a noun that identifies a single entity and is used to refer to that entity, such as London, Jupiter, Sarah, or Microsoft, as distinguished from a common noun, which is a noun that refers to a class of entities and may be used when referring to instances of a specific class

Explanation:

50% because no one is smart enough to relize that money makes the world go round and 99% of the earth hates donald trump the other 1% is the republicans go figure right

the answer would be in this answer. someone already asked the question.