The keyword term "patriot day quote" functions grammatically as a noun phrase. The main point and head of this phrase is the noun "quote".
In this construction, "Patriot Day" acts as a noun adjunct (or attributive noun). A noun adjunct is a noun that modifies another noun, functioning similarly to an adjective. Here, "Patriot Day," which is a proper noun, specifies the type or context of the "quote." It answers the question, "What kind of quote is it?" The answer is one related to Patriot Day. Therefore, the core grammatical subject is "quote," and "Patriot Day" serves to define its specific category.
Understanding that the primary part of speech is a noun is crucial for article development. This indicates that the central focus of the content should be the quotes themselves. The article should be structured around presenting, analyzing, or discussing specific quotations. The term "Patriot Day" provides the essential theme and scope, ensuring the selected quotes are relevant, but the fundamental subject matter remains the collection of verbal or written expressions (quotes).