The keyword phrase "September 11th Memorial and Museum" functions grammatically as a proper noun. A proper noun is a specific name for a particular person, place, or organization, and is always capitalized. In this case, it refers to the singular, official name of a specific institution located at the World Trade Center site in New York City.
Analyzing the components of the phrase reveals its structure. The core is the compound noun "Memorial and Museum," which identifies the nature of the institution. The phrase "September 11th" acts as an adjectival modifier, specifying the particular memorial and museum being discussed. When combined, these elements form a single, complete name that operates as one unit to designate a unique entity. It is not a common noun describing a general category, but the formal title of a distinct place.
Recognizing the phrase as a proper noun is the crucial first step for the article because it establishes the subject as a specific, singular entity. This dictates consistent capitalization and ensures the article's focus remains on this particular institution, rather than on general concepts of memorials or museums. This grammatical classification provides the foundation for clear and precise communication about the subject.
