The keyword term "september 11th news" is a noun phrase. The core of the phrase is the head noun "news," which is specified and modified by the preceding adjectival phrase "september 11th."
In this grammatical construction, "news" functions as an uncountable noun referring to information about recent events. The component "september 11th" acts as a compound adjective. It is derived from a proper noun ("September") and an ordinal number ("11th") to pinpoint the specific subject matter and temporal context of the news. This adjectival modifier distinguishes this particular body of information from any other news.
Identifying the term as a noun phrase is critical because it establishes the article's main point as a topic or entity to be described, analyzed, or explained. The article's focus will be on the content, characteristics, impact, or legacy of this specific category of information, treating it as a distinct subject of study. This differs fundamentally from a verb-based keyword, which would focus on an action, or a purely adjective-based keyword, which would focus on a quality.
