The keyword phrase "911 police" functions as a noun phrase. The primary part of speech, which serves as the main point, is the noun "police." In this construction, "911" acts as a modifier specifying a particular type or function of the police.
Grammatically, the term "911" is a noun adjunct (or attributive noun). It is a noun being used to modify another noun, "police." It functions like an adjective, answering the question "Which police?" The answer is the police associated with the 911 emergency telephone number system. This structure distinguishes the emergency response component of law enforcement from other police functions, such as administrative duties, community outreach, or non-emergency services.
For the purpose of writing an article, recognizing "911 police" as a noun is crucial. This determines its role within a sentence, where it can act as a subject (e.g., "911 police were dispatched to the scene") or an object (e.g., "The caller requested 911 police"). The entire phrase refers to a specific entity: the emergency law enforcement personnel who respond to calls made to the 911 system.
