The keyword term "911 lone" functions as a proper noun. It is an abbreviated or colloquial search query for the specific title of the American television series, 9-1-1: Lone Star. As a proper noun, its role is to name a unique entity, distinguishing it from all other things.
A grammatical analysis of the full title, 9-1-1: Lone Star, clarifies this classification. "9-1-1" serves as the primary name of the franchise, while "Lone Star" acts as a distinguishing subtitle or epithet. Within this subtitle, "Lone" is an adjective modifying the noun "Star," but the entire phrase "Lone Star" (a nickname for Texas) functions as a single conceptual unit. The combined title, and by extension its search-term variant, operates syntactically as a noun phrase that names a specific work of fiction.
For the purpose of article development, establishing the term as a proper noun is the critical step. This determination dictates that the subject matter must be the television series itself. The article's main point and subsequent content should focus on attributes of this specific entity, such as its plot, characters, setting, or cultural impact, rather than attempting to use the words "911" or "lone" in a different grammatical context (e.g., as a verb or a general adjective).