The keyword term is a noun phrase, in which the principal part of speech and main point is the noun "reaction". The proper noun "Patriots Day" functions as a noun adjunct, which is a noun used as an adjective to modify another noun, specifying the context of the reaction.
In this grammatical structure, "reaction" is the head noun, establishing it as the central subject. The modifier "Patriots Day" serves only to classify the type of reaction being examined. This construction distinguishes the topic from a simple description of the holiday itself. The focus is directed toward the consequences, sentiments, or events that followed or were in response to the holiday or events associated with it.
Therefore, any article developed from this keyword must focus on the analysis of these responses. The central theme is the effect, not the cause. The content should explore and detail the nature, scope, and impact of the public, official, or individual responses, using the holiday merely as the catalyst or contextual backdrop for that analysis.
