The keyword phrase "patriots day weekend boston" functions grammatically as a compound noun or noun phrase. The core part of speech, which serves as the main point for an article, is unequivocally a noun. The central element is the noun "weekend," which is being described and specified by the other terms.
In this construction, the proper nouns "Patriots Day" and "Boston" act as noun adjuncts, which are nouns that function as adjectives to modify another noun. "Patriots Day" specifies the particular occasion of the weekend, while "Boston" specifies its geographic location. The entire phrase does not describe an action (verb) or qualify another word (adjective/adverb), but rather names a single, specific conceptual entity: a particular event at a specific time and place.
Therefore, treating the keyword as a singular noun is crucial for the article's focus. The article's purpose is to define, describe, or provide information about this specific event. All content should revolve around this central subject, explaining what the "patriots day weekend boston" is, what it entails (such as the Boston Marathon), its cultural significance, and practical details associated with it.