The keyword phrase functions grammatically as a compound noun or a noun phrase. In this construction, "timeline" is the head noun, which is the core subject. The term "September 11th" acts as a noun adjunct or adjectival modifier, specifying the particular timeline being discussed. The entire phrase refers to a single, distinct concept: the chronological sequence of events related to the attacks of September 11, 2001.
A detailed grammatical analysis shows that "timeline" is a noun referring to a chronological representation of events. The component "September 11th" is a proper noun (a specific date) that modifies "timeline." Its function is to restrict the meaning of the general noun "timeline" to a very specific historical record. This grammatical relationship is essential because it packages a complex series of occurrences into a singular, definable subject suitable for analysis. The structure allows the article to treat the sequence of events as a unified entity rather than a disparate collection of facts.
By establishing the keyword as a noun phrase, the article's main point is defined as an object of studythe documented record itself. This grammatical determination frames the topic not as an action or a description, but as a concrete subject with its own properties, components, and significance. Consequently, the article can proceed to dissect this subject by detailing the specific events within it, analyzing the intervals between them, and examining the overall structure of that historical day as a coherent, documented narrative.
