The keyword term "Patriots' Day in USA" functions as a noun phrase. Its primary role is to name a specific entity, in this case, a civic holiday. The core of the phrase is the proper noun "Patriots' Day," which identifies the specific event.
A grammatical analysis of the phrase reveals its components. The headword is the common noun "Day." It is modified by the possessive noun "Patriots'," which acts as an adjectival determiner specifying the nature of the day. The entire unit, "Patriots' Day," forms a single proper noun. The subsequent part, "in USA," is a prepositional phrase that functions adverbially, providing locational context by modifying the proper noun to specify where this holiday is recognized.
Understanding that the entire term operates as a noun phrase is essential for article construction. As a noun, it will primarily serve as the subject or object within sentences. This determines its grammatical role, allowing it to be the central topic that is defined, described, or acted upon throughout the text (e.g., "Patriots' Day in USA is a state holiday," or "The article discusses Patriots' Day in USA.").
