The keyword phrase "september 11th historical events" functions as a noun phrase. The main point and the grammatical head of this phrase is the noun "events".
In this construction, "events" is the core subject. The other words in the phrase serve as modifiers that specify and describe this noun. The word "historical" is an adjective, clarifying the nature of the events. The term "September 11th" is a proper noun that acts as a noun adjunct, functioning like an adjective to specify which particular historical events are the subject of the article. This grammatical structure isolates "events" as the central concept to be discussed.
Understanding this is crucial for the article's structure because it dictates that the primary focus must be on the specific occurrences, actions, and outcomes of that day. The terms "historical" and "September 11th" provide the context and scope, ensuring the content is analytical and tied to a precise moment in time. The article should therefore be built around narrating, describing, and analyzing these specific "events."