The keyword term functions as a noun phrase. Its primary part of speech is a noun, specifically the word "song." The preceding words, "patriotic" and "day," act as modifiers that specify the type and context of the noun.
A detailed grammatical analysis reveals the function of each component. "Song" is the head noun, identifying the core subject as a musical composition. "Patriotic" is an adjective that describes the thematic content of the song, indicating it expresses devotion to or love for one's country. "Day" is an attributive noun (or noun adjunct), which functions as an adjective in this context. It modifies "song" by specifying the occasion for which it is intended, such as a national holiday or a day of remembrance.
Understanding this grammatical structure is crucial because it establishes that the article's central subject is a specific category of musical works. The focus is not on patriotism in general or on holidays themselves, but on the songs associated with them. This determination guides the content, ensuring the article analyzes musical pieces characterized by their patriotic sentiment and their connection to a specific commemorative day.
