The keyword phrase "patriots day 2025 marathon" functions grammatically as a noun phrase. The main point and headword of this phrase is the noun "marathon". All other words in the phrase serve to modify and specify this central noun.
In a detailed grammatical breakdown, "marathon" is the head noun, identifying the type of event. "Patriots Day" is a proper noun functioning as a noun adjunct, which modifies "marathon" by specifying the holiday or occasion with which the race is associated. The number "2025" acts as an adjective, further modifying "marathon" by specifying the year. Together, these components form a complex proper noun phrase that names a single, specific event.
This classification is crucial because it establishes the subject of your article. By identifying "marathon" as the core noun, all sentences can be structured correctly around this subject. For example, verb agreement must be singular ("The marathon is held..."), and pronouns must refer to a singular event (" It will take place..."). This grammatical foundation ensures clarity and precision, allowing the article to focus properly on the event itself as the central topic.