The keyword term functions grammatically as a proper noun phrase. Within this structure, the core element is the noun "officer," which is specified by the proper noun "Sean." The initial phrase, "Patriots Day," itself a proper noun, acts as an adjectival modifier, specifying the context or origin of "Officer Sean." The entire phrase collectively serves to name a single, specific entity.
In this construction, "Patriots Day" operates as a noun adjunct, a noun used to modify another noun. It pinpoints the subject's connection to the 2016 film Patriots Day. The phrase refers specifically to the character of Officer Sean Collier, a Massachusetts Institute of Technology police officer who was a victim of the Boston Marathon bombers. The combination of the title "officer" and the first name "Sean" creates a unique identifier that is further contextualized by the film's title, distinguishing this individual from any other person with the same name or title.
Determining that the term is a proper noun phrase is crucial because it defines the article's subject with precision. This classification establishes that the focus is not on a generic police officer associated with the holiday, but on a specific, named individual as depicted within a particular work of media. Consequently, this directs the article's content toward character analysis, historical portrayal, and the narrative role of Officer Sean Collier within the specific context of the film, ensuring clarity and focus for the reader.
