The keyword phrase "11 sep star" functions grammatically as a noun phrase. The core part of speech, which serves as the main point, is the noun "star." In this construction, "11 sep" (an abbreviation for September 11) acts as an adjectival modifier, specifying which particular "star" is the subject.
In a detailed grammatical analysis, "star" is the head noun of the phrase, determining its fundamental classification. The preceding elements, "11" and "sep," form a compound modifier that specifies the noun's identity by associating it with a specific date. This structure indicates that the article's subject is a particular person, object, celestial body, or metaphorical concept identified by its connection to September 11. The focus is on the entity itself, not an action or a quality.
Consequently, an article centered on this keyword must define and explore this specific noun. The central theme would be to answer the question, "What is the '11 sep star'?" The article's content would then provide a definition, description, history, or analysis of this specific entity. Classifying the keyword as a noun is crucial because it establishes that the article's primary purpose is to inform the reader about a particular subject.