The Taj Mahal is in Agra. which are common noun this sentence?

The common nouns in the sentence "The Taj Mahal is in Agra" are:

* Taj Mahal: While it's a famous landmark, it's still a specific building and not a general category like "monument" or "building".

* Agra: This refers to a city, a general category of place.

Let me know if you have any other sentences you'd like to analyze!