The keyword phrase "patriots day holiday april" functions grammatically as a compound noun phrase. Its core part of speech is a noun. Although it consists of four separate words, they combine to operate as a single nominal unit that names a specific, singular concept: the commemorative event known as Patriots' Day, which occurs in the month of April.
In this construction, individual nouns act as noun adjuncts or attributive nouns, meaning they function like adjectives to modify another noun. "Patriots Day" (a proper noun) modifies the common noun "holiday," specifying which particular holiday is the subject. The proper noun "April" further narrows the context by specifying the time frame. This stacking of nouns creates a highly precise identifier. The primary grammatical subject is "holiday," with "Patriots Day" and "April" serving as essential specifiers that are integral to the phrase's meaning.
Determining that the core of the keyword is a noun is crucial because it dictates that the article's primary purpose is expository and informative. The subject is an entitya specific event. Therefore, the article's content should focus on defining this entity by answering questions of "what" (its history and significance), "who" (the people it commemorates), "when" (its date), and "where" (the locations of its observance). This contrasts with an article centered on a verb (which would focus on actions or processes) or an adjective (which would focus on qualities or characteristics), thereby ensuring the content directly addresses the subject itself.
