"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
It is a proper noun, because it is the name of a specific thing.
proper
Proper noun
Pencil proper or common noun
it's a common noun. a proper noun would be Spider-Man.
Yes
The term 'United Kingdom' is a proper noun, the name of a specific nation of Europe, consisting of England, Scotland, Wales, Northern Ireland, Channel Islands, and the Isle of Man.A proper noun is always capitalized.
Proper noun or common noun
The noun cassette is a common noun.
a common noun?
Camel is a common noun.