The keyword phrase functions as a proper noun. As the specific, capitalized title of a unique organization, it operates grammatically as a single noun entity within a sentence, referring to that specific group.
An analysis of its internal structure reveals a complex noun phrase. The word "Families" is the head noun. It is pre-modified by the adjectival phrase "September 11th," which specifies the group's identity. The head noun is then post-modified by the prepositional phrase "for Peaceful Tomorrows," which functions adjectivally to describe the organization's purpose. While composed of various parts of speech, the entire construction is syntactically consolidated to serve as a single proper noun.
This grammatical classification is critical for correct usage in an article. Identifying the term as a proper noun dictates that it must be capitalized and treated as a singular subject (referring to the organization as a whole). This prevents it from being misinterpreted as a generic description of any families seeking peace and ensures it is correctly identified as the formal title of a specific entity.
