In the statement "Patriots Day is a federal holiday," the main point or keyword is the subject, "Patriots Day." Grammatically, this term functions as a proper noun. A proper noun is the specific name of a person, place, or thing; in this context, it names a unique commemorative day. The rest of the sentence serves to define or provide information about this central noun.
The sentence follows a subject-verb-complement structure. "Patriots Day" (the proper noun/subject) is linked by the verb "is" (a linking verb) to the subject complement "a federal holiday." This complement is a noun phrase, consisting of the noun "holiday" modified by the adjective "federal." The entire noun phrase functions as a predicate nominative, which renames or classifies the subject. Therefore, the core of the statement is the identification of the proper noun, with all other elements providing descriptive context.
For the purpose of an article, identifying "Patriots Day" as the primary proper noun is a crucial step. It establishes the holiday itself as the central topic. Consequently, the article's focus would be on the history, significance, and observance of Patriots Day. The fact that it is a "federal holiday" becomes a key attribute or sub-topic to be explored within the broader discussion of the main subject, rather than being the subject itself.
