The keyword term "patriots day movie" functions as a noun phrase. The primary part of speech, which serves as the grammatical head of the phrase, is the noun "movie".
In this construction, the proper noun "Patriots Day" acts as a noun adjunct (or attributive noun). A noun adjunct is a noun that modifies another noun, functioning like an adjective to specify its type or identity. Here, "Patriots Day" specifies which particular "movie" is the subject. The entire phrase refers to a single, specific entity: the film titled Patriots Day.
This grammatical determination is critical because it establishes that the article's core subject is the film itself. The term "Patriots Day" serves as a specific identifier, not the primary topic. Therefore, the article's focus should be on the cinematic workits plot, production, and receptionrather than on the holiday or the historical events, which serve as the film's context.