Here's why:
* Proper nouns are specific names: They identify unique entities like people, places, or things.
* Prepositional phrases describe: They provide information about location, time, or other attributes of a noun.
Combining these concepts leads to a contradiction:
* A proper noun already identifies a specific entity, making a prepositional phrase describing it redundant.
* Including a prepositional phrase within a proper noun would make it unclear what the actual name is.
Example:
* Incorrect: The city of "New York City"
* Correct: The city of "New York"
The phrase "of New York" adds information about the city's location, which isn't part of its proper noun.
However, there are some exceptions:
* Place names with inherent prepositional phrases: These phrases are part of the official name and are considered essential to its identification, like "The Strait of Gibraltar" or "The City of London."
* Figurative language: You might find creative uses in literature or poetry, but these are not standard grammatical structures.
In general, avoid putting prepositional phrases inside proper nouns. Focus on using them to describe the proper noun separately.