The keyword term "boston patriots day road closures" functions as a compound noun phrase. The grammatical core and primary subject of this phrase is the plural noun "closures." This identifies the main point for an article as the state or instance of being closed.
In this construction, "closures" serves as the head noun, while the preceding words act as modifiers specifying its context. "Road" is an attributive noun defining the type of closure. "Patriots Day" is a proper noun functioning adjectivally to establish the occasion. "Boston" is a proper noun that further modifies the phrase by providing the specific geographic location. This stacking of nouns creates a highly specific subject, with each preceding term narrowing the focus of the final noun.
For an article based on this keyword, this grammatical analysis dictates that the central focus must be on the details of the closures themselves. The modifiersBoston, Patriots Day, roadprovide the essential framework for the who, what, where, and why. Therefore, the content should primarily detail the specific routes affected, the timing of the closures, and their duration, as these elements directly elaborate on the core noun "closures."