The keyword term "september 11th poem" functions grammatically as a noun phrase. The main point or head of this phrase is the noun "poem". The preceding words, "september 11th," act as an adjectival modifier, specifying the subject matter or context of the poem.
In this construction, "poem" is the core noun that identifies the type of object or concept being discussed. The term "September 11th," which is a proper noun representing a specific date and historical event, is used attributively. An attributive noun functions like an adjective to describe or classify the noun that follows it. It answers the question, "What kind of poem is it?" In this case, it is a poem about or related to the events of September 11th.
Therefore, for the purpose of the article, the primary grammatical subject is "poem." This establishes the article's focus on a literary work. The modifier "September 11th" provides the essential context, narrowing the scope to a specific thematic category of poetry. The analysis confirms that the central element to be discussed is the poem itself.
