The main point of the keyword phrase "september 11th video for high school students" is a noun. The core subject of the entire phrase is the word "video," which is a noun representing a person, place, thing, or idea. All other words in the phrase serve to modify or describe this central noun.
A grammatical analysis of the phrase reveals that "video" acts as the head noun. The term "september 11th" functions as an adjectival phrase, specifying the subject matter of the video. Similarly, "for high school students" is a prepositional phrase that also functions as an adjective, defining the intended audience for the video. Both phrases modify the noun "video" by providing essential, restrictive information, narrowing the concept from any video to a very specific type of educational resource.
Identifying "video" as the main noun is crucial because it dictates that the article's primary focus must be on the resource itself. The content should analyze, recommend, or discuss the characteristics of specific videos (the tangible or digital objects) suited for this topic and audience. The modifiers ("september 11th" and "for high school students") provide the necessary context, but the central theme revolves around the medium of video as an educational tool.
