The primary component and main point of the keyword phrase "cast van patriots day" is the word "cast," which functions as a collective noun. In this context, "cast" refers to the group of actors and performers assembled for the film "Patriots Day." The word "van" is likely a typographical error or a mistranscription of "of" or "and," as it is grammatically superfluous to the core meaning.
Grammatically, the entire phrase functions as a noun phrase. The head noun, which carries the principal meaning, is "cast." The proper noun "Patriots Day" acts as a post-positive modifier (or adjectival noun), specifying which particular group of actors is the subject. This structure identifies a specific entity by joining the general category ("cast") with its specific identifier ("Patriots Day"). The core function is to name the specific group of performers associated with that film.
For the purpose of an article, identifying "cast" as the main noun is crucial. It dictates that the article's subject is not the film's plot or production in general, but specifically the ensemble of actors. The content should focus on listing the members of this group, detailing their roles, and potentially analyzing their collective performance and contribution to the film. The keyword directs the article to be an informational resource about this specific group of people.