The keyword phrase is grammatically a noun phrase. Its primary function is to name a specific entityin this case, the collective group of actors involved in the film titled "Patriot Day." The core word that determines its part of speech is the head noun, "cast."
A detailed grammatical analysis breaks the phrase into its constituent parts. "Cast" serves as the head noun, which is the central element of the phrase. The subsequent words, "of Patriot Day," form a prepositional phrase. Within this smaller phrase, "of" is the preposition, and the proper noun "Patriot Day" (the title of the film) is the object of the preposition. The entire prepositional phrase "of Patriot Day" functions adjectivally, modifying the noun "cast" by specifying which particular group of actors is being referenced.
Recognizing this structure as a noun phrase is fundamental because it dictates how the term can be used correctly within a sentence. As a noun phrase, it can function as a subject (e.g., "The cast of Patriot Day was praised by critics"), a direct object (e.g., "The director assembled the cast of Patriot Day"), or an object of another preposition (e.g., "The article focuses on the cast of Patriot Day"). This grammatical classification is the essential first step in constructing clear and accurate sentences for the article.
