The keyword term functions grammatically as a compound noun or noun phrase. In this construction, the final word, "certificate," serves as the head noun, which is the core subject. All preceding words"september 11th," "silver leaf," and "coin"act as modifiers (adjectives or noun adjuncts) that describe and specify the type of certificate.
A detailed grammatical analysis reveals a hierarchy of modification. The term "september 11th" is an adjectival phrase establishing the commemorative theme. "Silver leaf" is a compound adjective detailing a specific physical attribute of the associated object. The word "coin" is a noun adjunct that clarifies what the certificate pertains to. Therefore, the phrase describes a certificate that authenticates or accompanies a coin, which features a silver leaf and commemorates the events of September 11th.
For the purpose of an article, this grammatical structure dictates that the main point is the certificate itself. The article's focus should be on this documentits purpose (e.g., certificate of authenticity, commemorative issue), its issuer, its text, and its significance as part of a collectible set. The modifiers provide the essential context and define the specific collectible being discussed, but the certificate remains the central grammatical and thematic subject.
