The keyword term "patriot days trailer" functions as a noun phrase. The main point and grammatical head of this phrase is the noun "trailer."
In this construction, "trailer" is the core noun that identifies the subject: a short, promotional video. The term "Patriot Days" (a proper noun referring to the film Patriots Day) acts as a noun adjunct or attributive noun. It modifies the head noun "trailer" by specifying which promotional video is being discussed. This grammatical structure is common in English, where a noun is used to describe or classify another noun, similar to phrases like "car key" or "film review."
This analysis is crucial because it establishes that the central subject of an article using this keyword is not the film itself, but specifically its promotional trailer. The focus should be on the content, editing, marketing strategy, and audience reception of the trailer, as this is the specific entity identified by the keyword's primary noun.
