September 11th Terrorist Attacks (2001)
The keyword phrase "September 11th terrorist attacks (2001)" functions grammatically as a noun phrase. The core or head word of this phrase is the plural noun "attacks." This is the main point of the phrase, as it names the specific events. The other components of the phrase act as modifiers to describe and specify this noun. A detailed grammatical breakdown reveals the function of each component. The word "attacks" is the head noun. The term "terrorist" is an adjective modifying "attacks," specifying the nature of the events. "September 11th" is a proper noun (a specific date) that functions as an adjectival phrase, indicating when the attacks occurred. The parenthetical "(2001)" is a numeric specifier, further modifying the noun phrase to provide the specific year and distinguish the event with absolute clarity. All these elements work together to form a single, cohesive noun phrase that refers to a unique historical event. ...