The keyword term "11 september 2001 day" is a noun phrase. The primary part of speech, which serves as the main point or head of the phrase, is the common noun "day."
In this construction, the date "11 september 2001" functions as an adjectival modifier. While the date itself is a proper noun phrase, its grammatical role here is to specify and describe the noun "day." This is a common structure known as a noun adjunct or attributive noun, where one noun or noun phrase modifies another to provide specific information, answering the question "Which day?".
Understanding this structure is crucial because it establishes the article's subject as the "day" itselfits events, significance, and qualities. The date "11 september 2001" acts as a unique and specific identifier, but the grammatical focus remains on the noun "day." This allows for a thematic analysis centered on the attributes and impact of that specific twenty-four-hour period.
