The main point of the keyword term "september 11th us holiday" is the word "holiday," which functions grammatically as a noun. The entire term operates as a noun phrase, with "holiday" as its head or core element.
In this construction, "September 11th" and "US" act as adjectival modifiers that specify which holiday is being discussed. "September 11th" is a proper noun functioning as an adjective to pinpoint the specific date. "US" is also a proper noun used adjectivally to indicate the nationality or location of the holiday. These modifiers provide essential descriptive information, but the central subject being identified is the "holiday" itself.
Determining that the key part of speech is a noun is crucial because it frames the subject of the article as a specific entity or concept. The article's focus should be on defining, describing, and explaining this day of observanceits history, significance, and associated commemorations. The content will revolve around this particular event as a subject, rather than an action (verb) or a quality (adjective).
