The keyword term "patriots day imdb cast" functions as a compound noun or a noun phrase. The primary part of speech, which serves as the main point or subject, is the noun "cast."
In this phrase, the word "cast" is the head noun, identifying the core subject: the group of actors. The preceding words, "Patriots Day" and "IMDb," are proper nouns that act as noun adjuncts (or attributive nouns). They function like adjectives, modifying and specifying the head noun. "Patriots Day" identifies which specific film's cast is the subject, and "IMDb" specifies the context or source for this information (the cast list as found on the Internet Movie Database). The entire phrase collectively names a specific, singular concept.
Therefore, an article centered on this keyword would treat the "cast" as its central subject. The content would be dedicated to detailing the actors involved in the film "Patriots Day," with the information likely sourced from or compared to the listing on IMDb. The grammatical structure dictates that the focus is not on the movie or the website itself, but specifically on the list of performers associated with them.