The keyword phrase "september 11 public holiday usa" functions as a noun phrase. The central and most crucial part of speech within this phrase, which serves as the main point or subject, is the noun "holiday". All other words in the phrase act as modifiers to specify the exact nature of this noun.
In a grammatical analysis, the head of the phrase is "holiday". The word "public" is an adjective describing the type of holiday. The terms "september 11" and "usa" are proper nouns that function as noun adjuncts or adjectival phrases. "September 11" specifies the date, and "usa" specifies the location. Together, these components form a compound noun phrase that names a specific concept: a particular type of holiday associated with a specific date and country.
Therefore, for an article using this keyword, the main point is the concept of the holiday itself. The article's purpose would be to define, describe, and analyze this specific entity (the "September 11 public holiday in the USA"), focusing on its existence, status, and characteristics. The grammatical structure dictates that the subject matter is a thing or idea, not an action or a description.
