The keyword phrase "Patriots Day Jessica" functions as a proper noun. It operates as a single unit to name a specific, unique entityin this case, a character associated with the film Patriots Day.
In this construction, "Patriots Day" (itself a proper noun referring to the film's title) acts as an adjectival modifier, specifying which "Jessica" is the subject. The complete phrase refers to the character Jessica Kensky, a real-life survivor of the Boston Marathon bombing who was portrayed by actress Rachel Brosnahan in the 2016 film. The phrase isolates this specific individual from all others named Jessica.
Determining that the keyword is a proper noun is crucial because it establishes that the main point of the article must be centered on a specific person. The article's focus would not be on a general concept or action, but on describing, analyzing, or providing information about this particular character, the real individual she represents, or the actress's portrayal of her. The subject is the entity itself.
