The keyword term is a noun phrase. The main point of the phrase, and therefore the article, is the head noun: "quotes". The words "september 11th" and "remembrance" function as adjectival modifiers that specify the type and context of the quotes.
In this grammatical structure, "remembrance" is a noun adjunct, a noun used to modify another noun. It classifies the purpose of the "quotes". The term "september 11th" is a proper noun phrase that also acts as a modifier, specifying the subject of the remembrance. Together, "september 11th remembrance" forms a compound modifier that precisely defines the collection of quotes being discussed.
This grammatical determination is crucial because it dictates that the article's core subject must be the quotations themselves. The main point is not the act of remembrance or the historical event, but rather the specific verbal expressions used to commemorate it. The article should focus on presenting, analyzing, or contextualizing these textual artifacts.
