The keyword term functions grammatically as a noun phrase. In this construction, the word "game" is the head noun, which is the core concept being identified. The preceding words serve as modifiers that specify the type of game.
The components "Patriots Day" and "Red Sox" are both proper nouns that act as attributive nouns, or noun adjuncts. This means they function like adjectives, modifying the head noun "game". "Red Sox" specifies which team's game it is, and "Patriots Day" specifies the particular occasion or timing of this athletic event. The sequence of these modifiers narrows the definition from a general event to a highly specific, singular annual tradition.
Recognizing the term as a noun phrase is crucial because it establishes the event itself as the central subject of the article. The content should focus on this singular entityits history, cultural significance, and unique characteristicsrather than treating "game," "Red Sox," or "Patriots Day" as separate topics. This grammatical structure allows the entire phrase to act as a single unit, representing a well-known cultural event that can be the subject or object within a sentence.