Within the specified context, the keyword "Jessica" functions as a proper noun. A proper noun is a name that identifies a particular person, place, or organization. In this case, it refers to a specific individual associated with the film "Patriots Day."
The term "Jessica" acts as a modifier to the noun phrase "cast of patriots day film." Grammatically, it specifies and narrows the search query. The user is not asking for the entire cast list but is instead seeking information specifically related to a person named Jessica. This person is Jessica Kensky, a survivor of the Boston Marathon bombing whose story is a central part of the film's narrative. The query seeks to identify either the character, the real person, or the actress who portrayed her (Rachel Brosnahan).
Determining that "Jessica" is a proper noun is the critical step for an article on this topic. It establishes that the main point is not a general overview but a focused analysis of a specific entity. The article's content should therefore be centered on the identity and role of Jessica Kensky in the historical event and her character's depiction within the film's cast and story, thereby directly addressing the specific intent behind the search query.
